> Claude 3 Sonnet is a closed AI model from Anthropic, released 4 Mar 2024. Index score 95 (GPT-4 = 100), rank 193 of 229 ranked models.

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

# Claude 3 Sonnet

Anthropic

Released 4 Mar 2024

Closed

Flagship

Date verified

[Compare](https://themodelindex.org/compare/claude-3-sonnet-vs-mixtral-8x7b/) [Announcement](https://www.anthropic.com/news/claude-3-family)

9583–108

Index score

#193 of 229 models

1/ 8

Core tests taken

1 of 6 areas · plus 5 anchor tests

−10

Versus the frontier at release

best then: GPT-4 Turbo

Replaced by [Claude 3.5 Sonnet (Jun 2024)](https://themodelindex.org/models/claude-3-5-sonnet/)

–

Price per million tokens

no public API price found

–

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 12 months earlier.

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

Show 5 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

41%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

no result

Coding

evidence

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

#193

of 219 · 95

Epoch Capabilities Index

overall capability from many benchmarks

#163

of 239 · 120.7

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 3.5 Sonnet (Jun 2024); 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

4 Mar 2024

Announcement

[anthropic.com ↗](https://www.anthropic.com/news/claude-3-family)

Release entry

Claude 3 (Opus/Sonnet; Haiku 03-13)

Scored as

Claude 3 Sonnet

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## Anthropic releases · around this one

Claude 2.1

Closed

21 NOV 2023

index 93

Claude 3 Opus

Closed

4 MAR 2024

index 105

Claude 3 Sonnet

Closed

4 MAR 2024

index 95

Claude 3.5 Sonnet (Jun 2024)

Closed

20 JUN 2024

index 111

Claude 3.5 Sonnet

Closed

22 OCT 2024

index 118

---
Source: https://themodelindex.org/models/claude-3-sonnet/ · The Model Index · data as of 2026-10-01