Anthropic
Fourth-generation Sonnet model with extended thinking and strong agentic task performance. Optimised for workflows requiring a balance of capability and speed.
55.9
Quality Score
1312
Arena ELO
200.0K
Parameters
200K
Context
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
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May 2025
Released
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
claude-4-sonnet - SWE-Bench Verified
SWE-Bench Verified resolved rate 76.4
View sourceClaude 4 Sonnet Benchmark Update
Quality: 89/100 | Speed: 70/100 | Price: $3/M tokens | MMLU: 90.4% | HumanEval: 93%
View sourceClaude 4 Sonnet Benchmark Update
Quality: 89/100 | Speed: 70/100 | Price: $3/M tokens | MMLU: 90.4% | HumanEval: 93%
View sourceClaude 4 Sonnet Benchmark Update
Quality: 89/100 | Speed: 70/100 | Price: $3/M tokens | MMLU: 90.4% | HumanEval: 93%
View sourceClaude 4 Sonnet Benchmark Update
Quality: 89/100 | Speed: 70/100 | Price: $3/M tokens | MMLU: 90.4% | HumanEval: 93%
View sourceClaude 4 Sonnet Benchmark Update
Quality: 89/100 | Speed: 70/100 | Price: $3/M tokens | MMLU: 90.4% | HumanEval: 93%
View source1312
ELO Score
1302 - 1322
95% Confidence
+/-10 points
25.0K
Battles
Feb 15, 2026
Last Updated