> Claude 2 is a closed AI model from Anthropic, released 11 Jul 2023. Index score 91 (GPT-4 = 100), rank 199 of 229 ranked models.

[Models](https://themodelindex.org/models/) /[Anthropic](https://themodelindex.org/labs/anthropic/)

# Claude 2

Anthropic

Released 11 Jul 2023

Closed

Flagship

Date verified

[Compare](https://themodelindex.org/compare/claude-2-vs-llama-2/) [Announcement](https://www.anthropic.com/news/claude-2)

9177–105

Index score

#199 of 229 models

1/ 8

Core tests taken

1 of 6 areas · plus 3 anchor tests

−9

Versus the frontier at release

best then: GPT-4

Replaced by [Claude 2.1](https://themodelindex.org/models/claude-2-1/)

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Price per million tokens

no public API price found

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Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

GPT-4 reached this score 4 months earlier.

## Test results · by area · tick = best by any model

Show 3 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

35%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

no result

Coding

no evidence yet

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

evidence

APEX-Agents

no result

Novel problems

no evidence yet

ARC-AGI-2

no result

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#199

of 219 · 91

Epoch Capabilities Index

overall capability from many benchmarks

#165

of 239 · 120.1

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Replaced by Claude 2.1; it no longer leads any category among current models.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

Claude

app · subscription

↗

Claude API

API

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

11 Jul 2023

Announcement

[anthropic.com ↗](https://www.anthropic.com/news/claude-2)

Release entry

Claude 2

Scored as

Claude 2

Artificial Analysis index

–

Output speed

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Hugging Face

closed weights

## Anthropic releases · around this one

Claude

Closed

14 MAR 2023

Claude 2

Closed

11 JUL 2023

index 91

Claude Instant 1.2

Closed

9 AUG 2023

Claude 2.1

Closed

21 NOV 2023

index 93

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Source: https://themodelindex.org/models/claude-2/ · The Model Index · data as of 2026-10-01