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Claude Sonnet 4.6vsClaude Sonnet 4.5

Across 14 shared benchmarks, Claude Sonnet 4.6 leads overall: Claude Sonnet 4.6 wins 11, Claude Sonnet 4.5 wins 3, with 0 ties and an average score difference of +14.49.

Anthropic
Claude Sonnet 4.6

Anthropic · 2026-02-17 · Chat model

Anthropic
Claude Sonnet 4.5

Anthropic · 2025-09-30 · Chat model

Claude Sonnet 4.611 wins(79%)(21%)3 winsClaude Sonnet 4.5

Benchmark scores

Grouped by capability, sorted by largest gap within each. 14 shared benchmarks.

General Knowledge

Claude Sonnet 4.6 4/4
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
ARC-AGI-258.3021 / 6213.6038 / 62+44.70
LiveBench75.4712 / 115Thinking Medium (No Tools)53.6983 / 115Normal (No Tools)+21.78
HLE4932 / 17233.6080 / 172+15.40
GPQA Diamond89.9024 / 18783.4063 / 187+6.50

AI Agent - Tool Usage

Claude Sonnet 4.6 3/3
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
Terminal Bench 2.059.1022 / 4742.8042 / 47+16.30
OSWorld-Verified72.5016 / 2461.4020 / 24+11.10
MCP-Atlas69.5017 / 27Normal (With Tools)59.5021 / 27Thinking (With Tools)+10

Agent Level Benchmark

Claude Sonnet 4.5 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
τ²-Bench - Telecom97.909 / 35985 / 35-0.10

AI Agent - Information Search

Claude Sonnet 4.6 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
BrowseComp74.7027 / 5324.1051 / 53+50.60

Claw-style Agent Evaluation

Claude Sonnet 4.5 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
Pinch Bench885 / 37Thinking (With Tools)88.204 / 37Thinking (With Tools)-0.20

Coding and Software Engineer

Claude Sonnet 4.5 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
SWE-bench Verified79.6018 / 112828 / 112-2.40

Long Context

Claude Sonnet 4.6 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
AA-LCR713 / 156610 / 15+5

Math and Reasoning

Claude Sonnet 4.6 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
FrontierMath - Tier 48.3034 / 80Thinking (No Tools, 16K Budget)2.1056 / 80Normal (No Tools)+6.20

Productivity Knowledge

Claude Sonnet 4.6 1/1
BenchmarkClaude Sonnet 4.6Claude Sonnet 4.5Diff
GDPval-AA5711 / 213916 / 21+18

Specs

FieldClaude Sonnet 4.6Claude Sonnet 4.5
PublisherAnthropicAnthropic
Release date2026-02-172025-09-30
Model typeChat modelChat model
ArchitectureDenseDense
ParametersNot availableNot available
Context length1M1000K
Max output8K64K

API pricing

Prices use DataLearner records when available; missing fields are not inferred.

ItemClaude Sonnet 4.6Claude Sonnet 4.5
Text input$3 / 1M tokens$3 / 1M tokens
Text output$15 / 1M tokens$15 / 1M tokens
Cache read$0.3 / 1M tokens$0.3 / 1M tokens
Cache write$3.75 / 1M tokens$3.75 / 1M tokens

Summary

  • Claude Sonnet 4.6leads in:General Knowledge (4/4), AI Agent - Tool Usage (3/3), AI Agent - Information Search (1/1), Long Context (1/1), Math and Reasoning (1/1), Productivity Knowledge (1/1)
  • Claude Sonnet 4.5leads in:Agent Level Benchmark (1/1), Claw-style Agent Evaluation (1/1), Coding and Software Engineer (1/1)

On average across the 14 shared benchmarks, Claude Sonnet 4.6 scores 14.49 higher.

Largest single-benchmark gap: BrowseComp — Claude Sonnet 4.6 74.70 vs Claude Sonnet 4.5 24.10 (+50.60).

Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.