Anthropic releases cheaper Claude Haiku 5.5 across major clouds and GitHub Copilot
Overview
Anthropic has released Claude Haiku 5.5, which it says costs about 75 percent less to run on average than Haiku 4.5, at $0.10 per million input and $0.50 per million output tokens for prompts up to 100K tokens, rising to $0.50 and $2.50 above that.
Requests with non-default temperature, top_p or top_k values return a 400 error. The model is generally available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and GitHub Copilot, where it is billed at provider list pricing under usage-based billing.
Benchmark claims differ by source. Artificial Analysis scores it 43 on its Intelligence Index, ahead of OpenAI's GPT-6 Luna at 38, but says it uses about 3x more output tokens at max effort. Arena reports a 1587 score in Code Arena WebDev, up 257 points from Haiku 4.5. GitHub says early testing showed it matched Claude Sonnet 5 on many coding tasks while using fewer tokens and steps.
Separately, Anthropic halved Sonnet 5.5's cache read price to $0.10 per million tokens, which it says makes Sonnet 5.5 about 20 percent cheaper on most agentic work; Arena and Anthropic's own statements are the sources for these claims, and the change applies to API usage only.
Written by AI from the articles below · updated Oct 9, 8:10 AM ET
Check the sources:
Developments
18 developments
- Oct 8, 4:02 PM ET · 1 articleClaude Haiku 5.5 debuts at #30 in Code Arena WebDevArena: Claude Haiku 5.5 debuts at #30 in Code Arena WebDev
- Oct 8, 4:02 PM ET · 1 articleClaude Haiku 5.5 scores 1587 on Arena Code WebDev, up 257 points from Haiku 4.5Arena: Claude Haiku 5.5 scores 1587 on Arena, up 257 points from Haiku 4.5
- Oct 7, 9:04 PM ET · 3 articlesAnthropic releases Claude Haiku 5.5, priced to match GPT-6 LunaLatent Space: Claude Haiku 5.5 launches at GPT-6 Luna pricing with 1M context
- Oct 7, 8:05 PM ET · 1 articleClaude Haiku 5.5 price cut 90%, matching GPT-6 Luna pricingOrange AI: Claude Haiku 5.5 price cut 90%, matching GPT-6 Luna pricing
- Oct 7, 6:07 PM ET · 1 articleDatabricks makes Anthropic's Claude Haiku 5.5 available on its platform as a Day 0 launchDatabricks: Claude Haiku 5.5 launches on Databricks as a Day 0 release
- Oct 7, 5:15 PM ET · 2 articlesClaude Haiku 5.5 is now available in DevinCognition: Claude Haiku 5.5 now available in Devin, scores 58.4% on FrontierCode
- Oct 7, 4:12 PM ET · 2 articlesClaude Haiku 5.5 generally available in GitHub CopilotGitHub Copilot Changelog: Claude Haiku 5.5 is now generally available in GitHub Copilot
- Oct 7, 3:04 PM ET · 1 articleBoris Cherny says Claude Haiku 5.5 is a good Haiku, 10x cheaper than Haiku 4.5 with 100k contextBoris Cherny: Anthropic's Claude Haiku 5.5 offers 100k context at 10x lower cost
- Oct 7, 2:52 PM ET · 1 articleClaude Haiku 5.5 available on Amazon Bedrock and Claude Platform on AWSAWS Machine Learning Blog: Claude Haiku 5.5 becomes available on Amazon Bedrock and Claude Platform on AWS
- Oct 7, 2:48 PM ET · 1 articleAnthropic's Claude Haiku 5.5 is live on OpenRouterOpenRouter: Anthropic's Claude Haiku 5.5 launches on OpenRouter with lower prices
- Oct 7, 2:27 PM ET · 1 articleClaude Haiku 5.5 now available on Design ArenaDesign Arena: Claude Haiku 5.5 is now available on Design Arena
- Oct 7, 2:14 PM ET · 1 articleClaude Haiku 5.5 now available in CursorCursor: Claude Haiku 5.5 is now available in Cursor
- Oct 7, 2:08 PM ET · 1 articleHaiku 5.5 now available in Claude Platform and Claude CodeClaudeDevs: Claude Haiku 5.5 released, costing about 75% less than Haiku 4.5
- Oct 7, 2:01 PM ET · 3 articlesAnthropic halves Claude Sonnet 5.5 cache read price to $0.10 per million tokensClaude: Anthropic halves Claude Sonnet 5.5 cache read price to $0.10 per million tokens
- Oct 7, 2:01 PM ET · 1 articleClaude Haiku 5.5 shows major alignment improvements over Haiku 4.5Claude: Claude Haiku 5.5 shows far fewer misaligned behaviors than Haiku 4.5
- Oct 7, 2:01 PM ET · 2 articlesAnthropic describes Haiku 5.5 for high-volume, cost-sensitive tasksClaude: Anthropic's Claude Haiku 5.5 significantly improves on Haiku 4.5
- Oct 7, 1:58 PM ET · 1 articleHaiku 5.5 is live for me right nowAndrew Curran: Andrew Curran reports Haiku 5.5 is live for him
- Oct 7, 12:00 AM ET · 13 articlesAnthropic releases Claude Haiku 5.5, a small model with 1M context at $0.10 per million input tokensArtificial Analysis Articles: Anthropic releases Claude Haiku 5.5, scoring 43 on the Intelligence Index
Article timeline
The articles in this story. Times are ET.
Arena.ai@arenaOfficialArena weekly update: Nano Banana 2.1, Mistral Large 4, Claude Haiku 5.5 rankingsAIArena's weekly update says Nano Banana 2.1 ranked in the top six across three Image Arena modes, with #4 in Multi-Image Edit at 1431 points. Mistral Large 4 placed #43 overall in Agent Arena, 11 spots above Mistral Medium 3.5, and Claude Haiku 5.5 (High) landed #30 in Code Arena WebDev at 1587 points, priced at $0.10/$0.50 per 1M input/output tokens. The post also introduces Arena's Alignment Index and announces a $200M Series B at a $3.1B valuation.
- AI SupremacyBlogAnthropic Releases Claude Haiku 5.5 as Its Cheapest, Fastest Small Model
AIAnthropic released Claude Haiku 5.5, its cheapest and fastest small model, which it says costs around 75% less to run than Claude Haiku 4.5. The author argues Anthropic is the only frontier model builder, though the piece also covers Nous Research's $90 million Series B and OpenAI's revenue discrepancy.
- AI EraNewsAnthropic releases Claude Haiku 5.5 at a sharply lower price than prior models
AIAnthropic has released Claude Haiku 5.5, priced at one tenth of the previous Haiku 4.5 and one twentieth of Sonnet 5.5. The source excerpt is cut off before listing the full comparison, so the comparison with OpenAI's pricing is not confirmed here.
ClaudeDevs@ClaudeDevsOfficialAnthropic halves Sonnet 5.5 cache read prices on Claude PlatformAIAnthropic has cut Sonnet 5.5 cache read pricing in half to $0.10 per million tokens, with input at $2 and output at $10 per million tokens. The company says this makes Sonnet 5.5 roughly 20% cheaper on most agentic work. The change applies to API usage only and does not alter Claude Code usage limits.
Arena.ai@arenaOfficialClaude Haiku 5.5 debuts at #30 in Code Arena WebDevAIClaude Haiku 5.5 (High) debuted at #30 with 1587 points in Code Arena: WebDev, just outside the Pareto frontier. It matches GPT‑6 Luna's price at $0.10/$0.50 per 1M input/output tokens while scoring six points higher. Arena says it costs 90% less than Haiku 4.5 for +257 points, and 95% less than Sonnet 5.5 (High) for -128 points.

Arena.ai@arenaOfficialClaude Haiku 5.5 scores 1587 on Arena, up 257 points from Haiku 4.5AIAnthropic's Claude Haiku 5.5 reached 1587 points on the Arena WebDev leaderboard, a 257-point gain over Claude Haiku 4.5's 1330. The post says it also improved significantly across all categories.

- Don't Worry About the Vase (Zvi Mowshowitz)BlogAI #189: New Math covers OpenAI's math results and Claude's new pricing
AIOpenAI reportedly posted solutions to 90 of the top 500 open math problems, using an average of three hours of Pro-level compute per question. Anthropic released Claude Haiku 5.5 at $0.10 input and $0.50 output per million tokens, and the author says Jay Clayton was named AI Czar to head a new taskforce.
- The DecoderNewsClaude Haiku 5.5 cuts prices but uses more tokens than GPT-6 Luna
AIAnthropic released Claude Haiku 5.5, its fastest and most affordable small model, at prices up to 90 percent lower for most prompts under 100,000 tokens. Artificial Analysis ranks it first among small-class models on its Intelligence Index with a score of 43, but it consumes about three times the output tokens per task that GPT-6 Luna needs at maximum effort.
- Latent SpaceBlogPickClaude Haiku 5.5 launches at GPT-6 Luna pricing with 1M context
AIAnthropic released Claude Haiku 5.5, priced the same as OpenAI's GPT-6 Luna, with a 1M-token context window. Artificial Analysis scored it 43 on its Intelligence Index, slightly ahead of GPT-6 Luna at 38, but it uses about 3x more output tokens at max effort.
meng shao@shao__mengXClaude Haiku 5.5 tops GPT-6 Luna on benchmarks, with 2x faster token outputAIAnthropic's Claude Haiku 5.5, released alongside Claude Opus 5.5 and Claude Sonnet 5.5, is reported to lead GPT-6 Luna across benchmarks, with OpenRouter measuring roughly twice the token output speed. Anthropic says Haiku 5.5 is its cheapest, fastest, and most capable small model, costing about 75% less to run than Claude Haiku 4.5 on average. The post also notes some CodeX users are reportedly migrating to Claude Code.
Ado@adocompleteOfficialAnthropic halves Claude Sonnet 5.5 cache read price to $0.10 per million tokensAIAnthropic is halving the price of cache reads on Claude Sonnet 5.5, to $0.10 per million tokens. The company says this makes Sonnet 5.5 about 20% cheaper to run on most long-running work, where agents rely heavily on cached reads.
- QbitAINewsClaude Haiku 5.5 launches with higher benchmark scores and new migration requirements
AIAnthropic released Claude Haiku 5.5, which the article says outperforms DeepSeek V4.1 Flash and GLM-5.3-Flash on official benchmarks and matches GPT-6 Luna on price. On OSWorld 2.1, its Low effort tier scores 42.0% at $0.07 per task, versus 15.7% at $1.45 for Haiku 4.5 at Max. Migrating from Haiku 4.5 requires changes to thinking configuration, sampling parameters, assistant prefill, and the computer-use tool version.
Orange AI@oran_geXClaude Haiku 5.5 price cut 90%, matching GPT-6 Luna pricingAIOrange AI says Anthropic has cut Claude Haiku 5.5's price by 90%, bringing it in line with GPT-6 Luna. The post calls its capabilities strong and suggests it may be the best cost-performance model available.

- SiliconANGLE · AINewsAnthropic releases Claude Haiku 5.5 small model and halves Sonnet 5.5 cache read prices
AIAnthropic released Claude Haiku 5.5, a small model priced at about a quarter of Haiku 4.5's running cost. Anthropic also halved Sonnet 5.5 cache read prices from 20 cents to 10 cents per million tokens.
- IThome · AINewsPickAnthropic releases Claude Haiku 5.5, cutting run costs about 75% from Haiku 4.5
AIAnthropic released Claude Haiku 5.5, which it calls the fastest, cheapest, and most capable Haiku model so far. On average it costs about 75% less to run than Haiku 4.5, with input at $0.10 and output at $0.50 per million tokens for requests up to 100,000 tokens. Anthropic also cut Sonnet 5.5's cache read price from $0.20 to $0.10 per million tokens, which it says lowers run costs by about 20% on many agent tasks.
Databricks@databricksOfficialClaude Haiku 5.5 launches on Databricks as a Day 0 releaseAIAnthropic's Claude Haiku 5.5 is available on Databricks from day zero, which Databricks calls its cheapest, fastest, and most capable small model. On Databricks' OfficeQA Pro V1 benchmark, it delivers about 15% higher quality than Haiku 4.5 at a fraction of the cost. Users can run it alongside 60+ other models on data already in Databricks, with Unity Gateway handling governance, monitoring, and security.

Cognition@cognitionOfficialCognition shares a blog post on Claude Haiku 5.5AICognition's X post links to a blog post at devin.ai about Claude Haiku 5.5, but the text provides no further details. The post itself offers no benchmark scores, prices, or capabilities to report.
Cognition@cognitionOfficialClaude Haiku 5.5 now available in Devin, scores 58.4% on FrontierCodeAIClaude Haiku 5.5 is now available in Devin, scoring 58.4% on FrontierCode 1.1, ahead of Sonnet 5 at about one-eighth the cost per task. It can also serve as a sidekick model in Fusion, paired with Opus 5.5 as the Lead in Devin Desktop and CLI.

- Simon WillisonBlogAnthropic releases Claude Haiku 5.5, priced like GPT-6 Luna up to 100,000 tokens
AIAnthropic has released Claude Haiku 5.5, priced at $0.10 input and $0.50 output per million tokens up to 100,000 tokens, matching GPT-6 Luna. Beyond 100,000 tokens the price rises to $0.50 and $2.50, and the author found the new tokenizer uses about 1.25x as many tokens as Haiku 4.5 on the same long prompt. The model cannot disable reasoning and defaults to medium effort.
GitHub@githubOfficialClaude Haiku 5.5 is now generally available in GitHub Copilot.AIAnthropic's Claude Haiku 5.5 is now generally available in GitHub Copilot, a lightweight model built for fast, high-volume work such as subagents, quick edits, and terminal tasks. GitHub's early testing found it matched Claude Sonnet 5 on many coding tasks while using significantly fewer tokens and steps. It can be used in the GitHub Copilot app, CLI, or @code.
- MarkTechPostNewsAnthropic releases Claude Haiku 5.5, a small model with 1M context
AIAnthropic has released Claude Haiku 5.5, its cheapest and fastest small model, priced at $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100K tokens. It keeps a 1M token context window, up to 128K output tokens, and is generally available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry and Claude Platform on AWS. Anthropic reports 72.4% on OSWorld 2.1 (offline subset) versus 15.7% for Haiku 4.5, and the article notes that non-default temperature, top_p or top_k values return a 400 error.
- GitHub Copilot ChangelogOfficialClaude Haiku 5.5 is now generally available in GitHub Copilot
AIAnthropic's lightweight Claude Haiku 5.5 is now generally available in GitHub Copilot for fast, high-volume tasks such as subagents, quick edits, and terminal work. In early testing, it matched Claude Sonnet 5 on many coding tasks while using significantly fewer tokens and steps. The model is billed at provider list pricing under usage-based billing and is available to Copilot Pro, Pro+, Max, Business, and Enterprise users.
Boris Cherny@bchernyXAnthropic's Claude Haiku 5.5 offers 100k context at 10x lower costAIAnthropic's Claude Haiku 5.5 is described as a good Haiku, with a 100k token context window and roughly 10x lower cost than Claude Haiku 4.5. The quoted Claude announcement says it is the cheapest, fastest, and most capable small model Anthropic has released, costing about 75% less to run on average than Haiku 4.5.
- AWS Machine Learning BlogOfficialClaude Haiku 5.5 becomes available on Amazon Bedrock and Claude Platform on AWS
AIAnthropic's Claude Haiku 5.5 is now available on Amazon Bedrock and Claude Platform on AWS. According to Anthropic, it is the fastest and most efficient model in the Claude 5.5 family and costs around 75 percent less than Claude Haiku 4.5 for most tasks. The post also covers pairing it with Claude Opus 5.5 as a subagent layer and provides Boto3, Converse, and Anthropic SDK examples for calling the model.
OpenRouter@OpenRouterOfficialAnthropic's Claude Haiku 5.5 launches on OpenRouter with lower pricesAIAnthropic's Claude Haiku 5.5 is now available on OpenRouter as the first Haiku model supporting reasoning efforts. OpenRouter says it is about 75% cheaper than its predecessor, runs at over 100 tokens per second, and shows a clear benchmark capability gain.

- OpenRouter · New modelsBlogAnthropic releases Claude Haiku 5.5 for high-volume, cost-sensitive work
AIAnthropic has released Claude Haiku 5.5, a small, fast model for high-volume, cost-sensitive tasks such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding and computer use capabilities.
- OpenRouter · New modelsBlogAnthropic Releases Claude Haiku 5.5 for High-Volume, Cost-Sensitive Work
AIAnthropic has released Claude Haiku 5.5, a small, fast model for high-volume, cost-sensitive tasks such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding and computer use capabilities.
Design Arena@DesignArenaOfficialClaude Haiku 5.5 is now available on Design ArenaAIDesign Arena has added Anthropic's Claude Haiku 5.5, which the post describes as the company's fastest and most capable small model yet. It is aimed at high-volume, cost-sensitive work such as coding, classification, summarization, database queries, and speed-sensitive workflows like customer support and browser use. Per the background post from Claude, it costs around 75% less to run than Claude Haiku 4.5.

Thariq@trq212OfficialPickClaude Haiku 5.5 returns as a cheaper, faster small modelAIAnthropic has released Claude Haiku 5.5, which it describes as the cheapest, fastest, and most capable small model it has released. On average it costs around 75% less to run than Claude Haiku 4.5, and the author says it is 10x cheaper than Haiku 4.5 under 100k tokens. It can be tried with computer use, workflows, and the API.
Cursor@cursor_aiOfficialClaude Haiku 5.5 priced at $0.10/M input tokens, Sonnet cache cutAIAnthropic's Claude Haiku 5.5 is priced at $0.10 per million input tokens and $0.50 per million output tokens, rising to $0.50 and $2.50 above 100k input tokens. Claude Sonnet 5.5 cache reads have also dropped from $0.20 to $0.10 per million tokens. Cursor points readers to its CursorBench evaluations to compare Haiku 5.5.
Cursor@cursor_aiOfficialClaude Haiku 5.5 is now available in CursorAICursor now offers Claude Haiku 5.5, which costs 10x less than Claude Haiku 4.5 on shorter requests. Users can enable it under Cursor Settings > Models.

🚨 AI News | TestingCatalog@testingcatalogXAnthropic releases Claude Haiku 5.5, its fastest and cheapest modelAIAnthropic has released Claude Haiku 5.5, which the author describes as its fastest and cheapest model to date. The source says it costs about 75% less to run than Claude Haiku 4.5 and is the first Haiku model with an adjustable effort setting. The attached benchmark table reports Haiku 5.5 scores on tasks including computer use (OSWorld 2.1 offline subset, 72.4%) and Terminal-Bench 4.0 (39.2%), compared with Haiku 4.5 and other models.

ClaudeDevs@ClaudeDevsOfficialClaude Haiku 5.5 released, costing about 75% less than Haiku 4.5AIAnthropic has made Claude Haiku 5.5 available on the Claude Platform and in Claude Code, costing around 75% less to run than Haiku 4.5. The post recommends pairing it with Opus 5.5 or Sonnet 5.5 as a subagent for high-volume, cost-sensitive tasks such as summaries, compactions, or database queries.

Mike Krieger@mikeykOfficialAnthropic launches Claude Haiku 5.5, a faster, cheaper small modelAIAnthropic introduced Claude Haiku 5.5, which it calls the cheapest, fastest, and most capable small model it has released. On average, it costs about 75% less to run than Claude Haiku 4.5. The post positions Haiku 5.5 for high-volume work alongside Opus handling heavier reasoning tasks.
Ado@adocompleteOfficialAnthropic releases Claude Haiku 5.5, a small model it says costs about 75% less to runAIAnthropic has introduced Claude Haiku 5.5, which it describes as the cheapest, fastest, and most capable small model it has released. On average, running it costs around 75% less than Claude Haiku 4.5. The author's own post only announces availability and offers no further detail.
Anthropic@AnthropicAIOfficialPickAnthropic releases Claude Haiku 5.5, its latest small modelAIAnthropic has introduced Claude Haiku 5.5, which it calls the cheapest, fastest, and most capable small model it has released. On average, running it costs around 75% less than Claude Haiku 4.5.
Claude@claudeaiOfficialAnthropic halves Claude Sonnet 5.5 cache read price to $0.10 per million tokensAIAnthropic is halving the price of cache reads on Claude Sonnet 5.5 to $0.10 per million tokens. The company says this makes Sonnet 5.5 roughly 20% cheaper to run on most long-running work.
Claude@claudeaiOfficialClaude Haiku 5.5 now available on all major cloud platformsAIAnthropic has released Claude Haiku 5.5, available now across all platforms including Amazon Web Services, Google Cloud, and Microsoft Azure. The post links to Anthropic's announcement page for further details.
Claude@claudeaiOfficialClaude Haiku 5.5 shows far fewer misaligned behaviors than Haiku 4.5AIAnthropic says Claude Haiku 5.5 shows major improvements across almost all of its alignment evaluations compared with Claude Haiku 4.5. The post reports far fewer instances of misaligned behavior in the new model.
Claude@claudeaiOfficialAnthropic's Haiku 5.5 targets high-volume, cost-sensitive tasksAIAnthropic's Haiku 5.5 is built for high-volume, cost-sensitive work such as summaries and classification. It can serve as a subagent alongside Claude Opus 5.5 and Sonnet 5.5 on coding tasks. It is also fast enough for live customer support and browser use.
Claude@claudeaiOfficialAnthropic's Claude Haiku 5.5 significantly improves on Haiku 4.5AIAnthropic says Claude Haiku 5.5 is a significant step up over Haiku 4.5 across coding, computer use, and knowledge work. The post gives no benchmark scores, pricing, or availability details.

Claude@claudeaiOfficialPickAnthropic releases Claude Haiku 5.5 as its cheapest, fastest small modelAIAnthropic introduces Claude Haiku 5.5, which it describes as the cheapest, fastest, and most capable small model it has released. On average, running it costs around 75% less than Claude Haiku 4.5.

Andrew Curran@AndrewCurran_XAndrew Curran reports Haiku 5.5 is live for himAIAndrew Curran says Haiku 5.5 is live for him right now. The post gives no further details on availability, features, or pricing.

- Artificial Analysis ArticlesOfficialPickAnthropic releases Claude Haiku 5.5, scoring 43 on the Intelligence Index
AIAnthropic released Claude Haiku 5.5, which scores 43 on the Artificial Analysis Intelligence Index, up 26 points from the last Haiku release. Pricing is $0.10/$0.50 per 1M input/output tokens up to 100k tokens, rising to $0.50/$2.50 above that, but at max effort it uses about 162k output tokens per Intelligence Index task, roughly 3x GPT-6 Luna.
- Claude BlogOfficialPickAnthropic releases Claude Haiku 5.5, its cheapest and fastest small model
AIAnthropic released Claude Haiku 5.5, which it calls its cheapest, fastest, and most capable small model. It costs around 75% less to run than Haiku 4.5 and is aimed at high-volume, cost-sensitive tasks such as summaries and classification. The release also cuts Sonnet 5.5 cache read prices by 50%, and the model is available on AWS, Google Cloud, and Microsoft Azure.
- Claude Apps Release NotesOfficialPickClaude Haiku 5.5 launches as a fast, low-cost small model, and Max and Team plans gain monthly API credits
AIAnthropic launched Claude Haiku 5.5, which it describes as the cheapest, fastest, and most capable small model it has released, aimed at high-volume, cost-sensitive tasks. Max and Team plans now include monthly API credits for running their own apps and agents on the Claude Platform, rolling out over a few days. Users claim the credits by linking a Claude Console organization in Settings > Billing for Max or Organization settings > Billing for Team.
Heat trend
Not enough continuous observations to show a trend yet.