> Claude 3.5 Sonnet (Jun 2024) is a closed AI model from Anthropic, released 20 Jun 2024. Index score 111 (GPT-4 = 100), rank 155 of 229 ranked models.

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

# Claude 3.5 Sonnet (Jun 2024)

Anthropic

Released 20 Jun 2024

Closed

Flagship

Date verified

[Compare](https://themodelindex.org/compare/claude-3-5-sonnet-vs-qwen2/) [Announcement](https://www.anthropic.com/news/claude-3-5-sonnet)

111100–123

Index score

#155 of 229 models

2/ 8

Core tests taken

2 of 6 areas · plus 10 anchor tests

Frontier

Versus the frontier at release

set or matched the record

Replaced by [Claude 3.5 Sonnet](https://themodelindex.org/models/claude-3-5-sonnet-2024-10/)

–

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_

Among the first models to reach this score.

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

Show 8 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

54%

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

evidence

METR time horizon

11 min

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

#155

of 219 · 111

Epoch Capabilities Index

overall capability from many benchmarks

#126

of 239 · 133.5

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; 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

20 Jun 2024

Announcement

[anthropic.com ↗](https://www.anthropic.com/news/claude-3-5-sonnet)

Release entry

Claude 3.5 Sonnet

Scored as

Claude 3.5 Sonnet

Artificial Analysis index

–

Output speed

–

Hugging Face

closed weights

## Anthropic releases · around this one

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

Claude 3.5 Haiku

Closed

4 NOV 2024

index 107

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Source: https://themodelindex.org/models/claude-3-5-sonnet/ · The Model Index · data as of 2026-10-01