How much does Claude 2.1 cost?

We do not hold a list price for Claude 2.1 yet, so we cannot compare its cost. Check the maker's own price page.

Is Claude 2.1 open source?

We list Claude 2.1 as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").

How good is Claude 2.1 compared with other AI models?

On the Epoch Capabilities Index, Claude 2.1 scores 119.3 (likely range 111.9 to 121.8), which ranks 198 of 270 models we track. Scores close together are a tie in practice.

How does Claude 2.1 compare with Command R+?

On quality, neither model leads clearly across the 1 measure both have. 1 measure is too close to call. See the full comparison for every measure.

How current are these numbers for Claude 2.1?

The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

AI Rankings

Claude 2.1: Score, Price and Context Window

Where Claude 2.1 from Anthropic ranks, what it costs and how much text it can read, in plain numbers with the sources.

Data updated 26 Oct 2026

Anthropic
Closed weights
Released Nov 2023

Its score range overlaps with Qwen2.5-Coder-32B, the model just above it, so a small gap in rank is not a meaningful difference.

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Cutting-edge tasks: its overall Epoch score is in the lower part of the models we track.

These lines are worked out from the numbers on this page, not from hands-on testing.

Key facts

Overall score: 119.3; Rank 198 of 270. Likely range 111.9 to 121.8.
Weights: Closed; Used through the maker's apps or API (Epoch AI: API access).

We do not have an Arena human-vote rating, a list price and a context window size for Claude 2.1 yet. It is shown as "Not measured" rather than guessed.

Try itClaude in our AI tools directoryAnthropic's AI assistant for research, writing, code, files, and connected tasks, with free and paid plans.

How Claude 2.1 stacks up

Each strip shows every model we track as faint bars. The dot is this model. Better is always to the right, even for price.

Claude 2.1 compared with all models we trackOverall capability: 119.3. Better than 26% of the other 269 models.

Overall capability119.3
Better than 26% of the other 269 models
Epoch Capabilities Index: one score that combines many tests.

Compared with the other published models that have each measure. Data updated 26 Oct 2026.

Where Claude 2.1 ranks

Leaderboards it appears on, best placing first.

See all leaderboards

Test results

Each test checks one kind of skill. Place shows where it stands among the models that took that test.

GPQA Diamond
Very hard multiple-choice science questions in biology, physics and chemistry, written by experts and designed so a quick web search does not give the answer.
33.0%
Place 169 of 183
OTIS Mock AIME
Maths competition problems in the style of the US AIME exam, from the 2024 and 2025 sets. Every answer is a whole number.
1.9%
Place 163 of 174
tied with 2 others

Similar models

Models from other makers with a similar overall score.

Learn more

Questions about Claude 2.1

How much does Claude 2.1 cost?: We do not hold a list price for Claude 2.1 yet, so we cannot compare its cost. Check the maker's own price page.
Is Claude 2.1 open source?: We list Claude 2.1 as closed: it is used through its maker's apps or API and its weights are not published (Epoch AI lists its access as "API access").
How good is Claude 2.1 compared with other AI models?: On the Epoch Capabilities Index, Claude 2.1 scores 119.3 (likely range 111.9 to 121.8), which ranks 198 of 270 models we track. Scores close together are a tie in practice.
How does Claude 2.1 compare with Command R+?: On quality, neither model leads clearly across the 1 measure both have. 1 measure is too close to call. See the full comparison for every measure.
How current are these numbers for Claude 2.1?: The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

Where this data comes from

Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake