Claude Sonnet 5

Mid-tier

Claude Sonnet 5 is Anthropic's most agentic Sonnet-class model, released June 30, 2026 as an upgrade to Sonnet 4.6 that narrows the gap to Opus 4.8 on reasoning, tool use, coding, computer use, and knowledge work while staying priced below the flagship. Introductory rates are $2 per million input tokens and $10 per million output tokens through August 31, 2026, moving to $3 and $15 from September onward. It ships a 1 million token context window with context compaction and adaptive thinking with selectable effort levels up to xhigh. Anthropic's own numbers show 85.2 on SWE-bench Verified, 63.2 on SWE-bench Pro, 78.3 on SWE-bench Multilingual, 81.2 on OSWorld-Verified, 84.7 on BrowseComp, and 80.4 on Terminal-Bench 2.1 (beating Opus 4.8 at 74.6 on that specific benchmark). Available on the Claude API, Amazon Bedrock, Google Vertex, and Microsoft Foundry at launch.

Input Price

$2.00

per 1M tokens

Output Price

$10.00

per 1M tokens

Context Window

tokens

Released

2026-06

API access

Capabilities

textvisiontool-usecodereasoning

Key Strengths

✓1M token context window with context compaction
✓Introductory $2/$10 pricing through August 31, 2026
✓Adaptive thinking up to xhigh effort level
✓Beats Opus 4.8 on Terminal-Bench 2.1 (80.4 vs 74.6)
✓Day-one availability on Claude API, Bedrock, Vertex, and Foundry

Best For

▸Cost-sensitive agentic coding pipelines
▸Long-running tool-use workflows
▸Production RAG and knowledge work
▸Computer-use and browser agents

Benchmark Scores

Benchmark	Score	Description
SWE-bench	85.2	Real-world software engineering tasks from GitHub issues (SWE-bench Verified)

Scores sourced from public benchmark datasets. See full benchmark leaderboard for all models.

Pricing Details

Input tokens

$2.00

per 1M tokens

Output tokens

$10.00

per 1M tokens

Estimated cost per 1K requests

$7.00

Mid-tier