Claude Haiku 5.5
No shutdown before this date. Claude Haiku 5.5 stays on the Claude API until at least Oct 7, 2027.
≥ 12 mo- Earliest retirement
- ≥ 358 daysOct 7, 2027 · Claude API
- GPQA Diamond
- 89.6%#40 of 108 · Epoch AI
- Arena WebDev
- 1,587#18 of 69 · Arena
- List price · $ per 1M
- $0.10 in $0.50 outClaude API · cached input $0.01
- Context window
- 1MMax output 128K tokens
Dates on every platform
| Platform | Model ID and status | Deprecated | Shuts down | Replacement |
|---|---|---|---|---|
| Claude APIAnthropic: Model deprecations (opens in a new tab) · checked Oct 14, 2026 | claude-haiku-5-5Active | – | ≥ 12 moNot sooner than | – |
| Azure AI FoundryMicrosoft: Claude models in Microsoft Foundry (opens in a new tab) · checked Oct 14, 2026 | claude-haiku-5-5:1Active | – | None set | – |
| Azure AI FoundryMicrosoft: Claude models in Microsoft Foundry (opens in a new tab) · checked Oct 14, 2026 | claude-haiku-5-5:2Active | – | None set | – |
| Amazon BedrockAmazon Web Services: Amazon Bedrock ListFoundationModels, us-east-1 (opens in a new tab) · checked Oct 14, 2026 | anthropic.claude-haiku-5-5Active · also au.anthropic.claude-haiku-5-5, eu.anthropic.claude-haiku-5-5, global.anthropic.claude-haiku-5-5, jp.anthropic.claude-haiku-5-5, us.anthropic.claude-haiku-5-5 | – | ≥ 12 moNot sooner than | – |
| Google Vertex AIGoogle Cloud: Claude Haiku 5.5 on Google Cloud (opens in a new tab) · checked Oct 14, 2026 | claude-haiku-5-5Active | – | ≥ 12 moNot sooner than | – |
Version 1 runs on Anthropic infrastructure.
Version 2 runs on Azure infrastructure.
In us-east-1, requests go through a cross-Region inference profile (listed in aliases).
What breaks when you move off Claude Haiku 5.5
- Parameters
- Parameters
- Tokenizer
- Pricing
Intelligence
| Benchmark | Publisher | Score | Rank | Published |
|---|---|---|---|---|
| GPQA Diamond | Epoch AI | 89.6% ± 2.0% | #40 of 108 | Oct 9, 2026 |
| Arena WebDev | Arena | 1,587 ± 10 | #18 of 69 | Oct 8, 2026 |
| FrontierMath Tier 4 | Epoch AI | 46.3% ± 7.9% | #18 of 58 | Oct 7, 2026 |
| FrontierMath Tiers 1-3 | Epoch AI | 75.1% ± 2.6% | #18 of 71 | Oct 7, 2026 |
| OTIS Mock AIME 2024-2025 | Epoch AI | 98.9% ± 0.5% | #12 of 105 | Oct 7, 2026 |
| SimpleQA Verified | Epoch AI | 23.8% ± 1.3% | #58 of 68 | Oct 9, 2026 |
Arena (arena.ai), https://arena.ai/leaderboard
Epoch AI, ‘Capabilities & benchmarking’. Published online at epoch.ai. Retrieved from ‘https://epoch.ai/benchmarks’ [online resource].
List prices
| Platform | Input | Cached | Output | In effect | Source |
|---|---|---|---|---|---|
Claude APIclaude-haiku-5-5 | $0.10 | $0.01 | $0.50 | Oct 7, 2026Current · Prompts over 100,000 tokens are billed at higher rates for the whole request. | Anthropic: Pricing (opens in a new tab) |
Amazon Bedrockanthropic.claude-haiku-5-5 | $0.11 | $0.011 | $0.55 | Oct 1, 2026Current · Standard tier, in-Region or geographic cross-Region inference, which Bedrock prices 10% above global cross-Region inference. Long-context requests are billed at higher rates. | Amazon Web Services: AWS Price List API: AmazonBedrockFoundationModels, us-east-1 (opens in a new tab) |
Google Vertex AIclaude-haiku-5-5 | $0.10 | $0.01 | $0.50 | Oct 7, 2026Current · Requests with 100K or more input tokens are billed at higher rates. Global endpoint price; regional and multi-region endpoints cost more. | Google Cloud: Agent Platform pricing (opens in a new tab) |
Change history
ReleaseClaude Haiku 5.5 releasedClaude API, Google Vertex AI4 breaks
Anthropic released Claude Haiku 5.5 with a 1M token context window and prices that rise for prompts over 100,000 tokens. Google Cloud lists the same release date.
- Platform
- Claude API, Google Vertex AI
- Model
- Claude Haiku 5.5
- ParametersThinking type "enabled" with budget_tokens returns a 400 error. Use adaptive thinking and an effort level.
- ParametersNon-default temperature or top_p values, any top_k value, and assistant prefill return a 400 error.
- TokenizerThe same text produces about 30% more tokens than on Claude Haiku 4.5.
- PricingRequests with prompts over 100,000 tokens pay higher prices for the whole request.
Source: Anthropic, Claude Haiku 5.5 (opens in a new tab); Anthropic, Claude Haiku 5.5 migration guide (opens in a new tab); Anthropic, Pricing (opens in a new tab); Google Cloud, Claude Haiku 5.5 on Google Cloud (opens in a new tab); Google Cloud, Gemini Enterprise Agent Platform release notes (opens in a new tab)
ReleaseClaude Haiku 5.5 available on Amazon BedrockAmazon Bedrock
Bedrock added Claude Haiku 5.5 as anthropic.claude-haiku-5-5.
- Platform
- Amazon Bedrock
- Model
- Claude Haiku 5.5
Source: Amazon Web Services, Amazon Bedrock ListFoundationModels, us-east-1 (opens in a new tab)