Claude Sonnet 4.6vsClaude Sonnet 4.5
Across 8 shared benchmarks, Claude Sonnet 4.6 leads overall: Claude Sonnet 4.6 wins 6, Claude Sonnet 4.5 wins 2, with 0 ties and an average score difference of +28.81.
Claude Sonnet 4.6
Anthropic · 2026-02-17 · Chat model
Claude Sonnet 4.5
Anthropic · 2025-09-30 · Chat model
Claude Sonnet 4.66 wins(75%)(25%)2 winsClaude Sonnet 4.5
Benchmark scores
Grouped by capability, sorted by largest gap within each. 8 shared benchmarks.
AI Agent - Tool Usage
Claude Sonnet 4.6 2/2| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| Terminal Bench 2.0 | 59.1022 / 48Thinking (With Tools) | 42.8043 / 48Thinking (With Tools) | +16.30 |
| OSWorld-Verified | 72.5017 / 26Thinking (With Tools) | 61.4022 / 26Thinking (With Tools) | +11.10 |
Agent Level Benchmark
Claude Sonnet 4.5 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| τ²-Bench - Telecom | 97.909 / 36Thinking (With Tools) | 985 / 36Thinking (With Tools) | -0.10 |
AI Agent - Information Search
Claude Sonnet 4.6 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| BrowseComp | 74.7029 / 57Thinking (With Tools) | 24.1055 / 57Thinking (With Tools) | +50.60 |
Claw-style Agent Evaluation
Claude Sonnet 4.5 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| Pinch Bench | 886 / 38Thinking (With Tools) | 88.205 / 38Thinking (With Tools) | -0.20 |
Long Context
Claude Sonnet 4.6 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| AA-LCR | 7111 / 29Thinking (No Tools) | 6618 / 29Thinking (No Tools) | +5 |
Productivity Knowledge
Claude Sonnet 4.6 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| GDPval-AA | 5711 / 21Thinking (No Tools) | 3916 / 21Thinking (No Tools) | +18 |
Writing and Creative Capabilities
Claude Sonnet 4.6 1/1| Benchmark | Claude Sonnet 4.6 | Claude Sonnet 4.5 | Diff |
|---|---|---|---|
| Creative Writing | 1,80418 / 106Normal (No Tools) | 1,67430 / 106Normal (No Tools) | +129.80 |
Specs
| Field | Claude Sonnet 4.6 | Claude Sonnet 4.5 |
|---|---|---|
| Publisher | Anthropic | Anthropic |
| Release date | 2026-02-17 | 2025-09-30 |
| Model type | Chat model | Chat model |
| Architecture | Dense | Dense |
| Parameters | Not available | Not available |
| Context length | 1M | 1000K |
| Max output | 8K | 64K |
API pricing
Prices use DataLearner records when available; missing fields are not inferred.
| Item | Claude Sonnet 4.6 | Claude Sonnet 4.5 |
|---|---|---|
| Text input | $3 / 1M tokens | $3 / 1M tokens |
| Text output | $15 / 1M tokens | $22.5 / 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:AI Agent - Tool Usage (2/2), AI Agent - Information Search (1/1), Long Context (1/1), Productivity Knowledge (1/1), Writing and Creative Capabilities (1/1)
- Claude Sonnet 4.5leads in:Agent Level Benchmark (1/1), Claw-style Agent Evaluation (1/1)
On average across the 8 shared benchmarks, Claude Sonnet 4.6 scores 28.81 higher.
Largest single-benchmark gap: Creative Writing — Claude Sonnet 4.6 1,804 vs Claude Sonnet 4.5 1,674 (+129.80).
Page generated from structured model, pricing and benchmark records. No real-time LLM is used to write the prose.