The Model Index
Models/Anthropic

Claude 3.5 Sonnet (Jun 2024)

AnthropicReleased 20 Jun 2024ClosedFlagshipDate verified
111100–123Index score#155 of 229 models
2/ 8Core tests taken2 of 6 areas · plus 10 anchor tests
FrontierVersus the frontier at releaseset or matched the recordReplaced by Claude 3.5 Sonnet
–Price per million tokensno public API price found
–Context windowtokens it reads at once

Where it sitson the frontier

Among the first models to reach this score.

Test resultsby area · tick = best by any model

Reasoning & knowledgeevidence
GPQA Diamond
54%
Humanity's Last Exam
no result
Mathsevidence
FrontierMath T1-3
no result
Codingevidence
SWE-bench Verified
no result
Terminal-Bench
no result
Agentsevidence
APEX-Agents
no result
Novel problemsno evidence yet
ARC-AGI-2
no result
Long tasksevidence
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 sayrank on each leaderboard

The Model Indexindependent tests, our method#155of 219 · 111
Epoch Capabilities Indexoverall capability from many benchmarks#126of 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 attop 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 itprices checked 1 Oct 2026

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

Released20 Jun 2024
Announcementanthropic.com ↗
Release entryClaude 3.5 Sonnet
Scored asClaude 3.5 Sonnet
Artificial Analysis index–
Output speed–
Hugging Faceclosed weights

Anthropic releasesaround this one