Claude 2

Benchmarks, price, context and versions

Direct answer: Claude 2 is a model from Anthropic. 34.7% on GPQA Diamond, per Epoch AI.

✓ Good for

Not enough data in the open sources this section uses to build this block.

✕ Not the best for

technical reasoning on science topics (#174 of 198 on GPQA Diamond)
calculation and problems with an exact answer (#169 of 186 on OTIS Mock AIME)

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

34.7%

highest score on this metric 96.4%

174º / 198 · Epoch AI, latest version we checked

OTIS Mock AIME

2.5%

highest score on this metric 100%

169º / 186 · Epoch AI, latest version we checked

Key specs

Lab: Anthropic
Origin: the US
Family: Claude provisional data
Weights?: closed
License: no data
Input US$/1M?: no data
Output US$/1M: no data
Context?: no data
Parameters: no data
Input: no data
OpenRouter usage?: no data
Downloads (30 days)?: no data
Use cases provisional data: Text
Dates in sources: 2023, published, per Epoch AI

Version history

2026 Anthropic: Claude Fable 5.2 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Haiku 5.5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Sonnet 5.5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Opus 5.5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Fable 5.1 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Opus 5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Sonnet 5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Fable 5 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Opus 4.8 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Opus 4.7 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Sonnet 4.6 OpenRouter, listed on OpenRouter
2026 Anthropic: Claude Opus 4.6 OpenRouter, listed on OpenRouter
2025 Anthropic: Claude Opus 4.5 OpenRouter, listed on OpenRouter
2025 Anthropic: Claude Haiku 4.5 OpenRouter, listed on OpenRouter

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

FAQ

What is Claude 2?

Claude 2 is a model from Anthropic, with closed weights, used for text.

How much does Claude 2 cost?

No data in open sources.

What is the context window of Claude 2?

No data in open sources.

Is Claude 2 open source?

No. It is available through API only.

What is Claude 2's GPQA Diamond score?

34.7% on GPQA Diamond, per Epoch AI.

Is Claude 2 good for coding?

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

Who made Claude 2?

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

provisional data Questions under review: Semrush had no API balance during collection. Answers use source data only.

Models from Anthropic

Claude 2.1

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.

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.