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anthropicanthropic·Feb 17, 2026

Anthropic: Claude Sonnet 4.6

anthropic/claude-sonnet-4.6
context
1M
Max Output
128K
Input / 1M
$3.00
Output / 1M
$15.00

About

Claude Sonnet 4.6 is Anthropic's most capable Sonnet-class model, with strong performance across coding, agents, and professional work. It scores 79.6% on SWE-bench Verified, 59.1% on Terminal-Bench 2.0, and 72.5% on OSWorld-Verified, all improvements over Sonnet 4.5. It excels at iterative development, complex codebase navigation, end-to-end project management with memory, polished document creation, and computer use for web QA and workflow automation. Anthropic reports improved resistance to prompt injection over Sonnet 4.5. The model supports a 1M-token context window with up to 128K tokens of output, and accepts text and image input.

Capabilities

Context Length
1M
Max Output
128K
Reasoning
Yes
In
text, image
Out
text

Benchmarks

View leaderboard
35.9#42 of 133
Intelligence Index
46.4#18 of 118
Coding Index

Reasoning & Knowledge

GPQA Diamond79.9%
HLE13.2%

Coding & Agentic

SciCode46.9%
Terminal-Bench Hard46.2%

Source: Artificial Analysis

Pricing

Full pricing
TypePrice / 1M tokens
Input$3.00
Output$15.00
Cache Read$0.30
Cache Write$3.75
Web Search$0.01 / call

API

API reference

Anthropic-compatible · Model ID anthropic/claude-sonnet-4.6

curl https://api.elliotgate.com/v1/chat/completions \
  -H "Authorization: Bearer sk-omg-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-sonnet-4.6",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

OFTEN COMPARED

Claude Sonnet 4.6 comparisons

Decide which model wins on the dimensions that matter for your workload — context, benchmarks, pricing, or serving latency.