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Anthropic

Claude Haiku 5.5

Benchmarks, price, context and versions

Also searched as

Claude Haiku, claude haiku 5.5 pricing, claude haiku 5.5 release date, claude haiku 5.5 api pricing

Direct answer: Claude Haiku 5.5 is a model from Anthropic. 89.6% on GPQA Diamond, per Epoch AI.

✓ Good for

  • technical reasoning on science topics (#48 of 198 on GPQA Diamond)
  • calculation and problems with an exact answer (#23 of 186 on OTIS Mock AIME)
  • very long documents or code (a window of 1 million tokens or more, according to OpenRouter)

✕ Not the best for

  • answering short facts with little invention (#72 of 87 on SimpleQA Verified)

This block follows a rule of this section, using source data: if the model is in the top 25% of the metric, the item goes under "Good for"; if it is in the bottom half, it goes under "Not the best for". The middle band appears in neither. Price and context use OpenRouter; scores use Epoch AI or OpenRouter Benchmarks, in the latest version we checked.

Benchmarks

GPQA Diamond

?what it is
89.6%

highest score on this metric 96.4%

48º / 198 · Epoch AI, latest version we checked

OTIS Mock AIME

?
98.9%

highest score on this metric 100%

23º / 186 · Epoch AI, latest version we checked

FrontierMath (tiers 1 to 3)

?
75.1%

highest score on this metric 95.1%

23º / 86 · Epoch AI, latest version we checked

SimpleQA Verified

?
23.8%

highest score on this metric 94%

72º / 87 · Epoch AI, latest version we checked

GPQA Diamond (OpenRouter)

?
87.1%

highest score on this metric 96.5%

57º / 135 · OpenRouter Benchmarks, latest version we checked

τ-bench Verified (airline)

?
74%

highest score on this metric 82%

63º / 131 · OpenRouter Benchmarks, latest version we checked

Key specs

Origin
the US
Family
Claude Haiku provisional data
Weights?
closed
License
no data
Input US$/1M?
US$ 0.10 to check
Output US$/1M
US$ 0.50
Context?
1,000,000 tokens
Parameters
no data
Input
file, image, text
OpenRouter usage?
1.27%
Downloads (30 days)?
no data
Use cases provisional data
Text Agents
Dates in sources
  • 2026, published, per Epoch AI
  • 2026, listed on OpenRouter

Version history

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch.

FAQ

How much does Claude Haiku 5.5 cost?

On OpenRouter, US$ 0.10 per 1 million input tokens and US$ 0.50 per 1 million output tokens. odd value in the source, under review.

What is Claude Haiku 5.5?

Claude Haiku 5.5 is a model from Anthropic, with closed weights, used for text, agents.

What is the context window of Claude Haiku 5.5?

1,000,000 tokens, per OpenRouter.

Is Claude Haiku 5.5 open source?

No. It is available through API only.

What is Claude Haiku 5.5's GPQA Diamond score?

89.6% on GPQA Diamond, per Epoch AI.

Is Claude Haiku 5.5 good for coding?

No data: there is no SWE-bench Verified measurement for it in open sources.

Who made Claude Haiku 5.5?

It was made by Anthropic, a lab from the US.

provisional data Questions ordered by what shows up in public Google search suggestions (no volume). Answers use source data only.

Models from Anthropic

See lab

Anthropic does not publish weights on Hugging Face: data only via OpenRouter and Epoch AI.

Sources

  • Epoch AI, CC BY 4.0, latest version we checked.
  • OpenRouter, dados públicos da API; exports de benchmarks e rankings em CC BY 4.0, latest version we checked.
  • OpenRouter Benchmarks, CC BY 4.0, latest version we checked.

Dates come from the sources: OpenRouter listing or Hugging Face repo creation, which may differ from the official launch. Family and version were grouped by rule from the name.