💰 PriceJuly 18, 2026
Claude Sonnet 5 intro pricing extended
Intro pricing extended through August 31, 2026: $2/$10 per million tokens (input/output).
Claude Sonnet 5
🧠 Reasoning🌐 Web Search
The most agentic Sonnet yet, released June 30. Can make plans and run tools autonomously. Best value for daily work, now at intro pricing.
Released June 30, 2026
Pricing
Input tokens$2.00/M
Output tokens$10.00/M
Capacity
Context window1.0M tokens
Max output128K tokens
Capabilities
✓Reasoning & Planning
✓Web Search
✗Open Source
Best Scores
GDPval-AA v21603.0 pts
GPQA Diamond91.1%
SWE-bench Verified82.1%
Terminal-Bench 2.180.4%
SWE-bench Pro63.2%
Best For
✍️writing
📊analysis
💻coding
Benchmark Scores
Specialized Skills
GDPval-AA v2
Real paid work from 44 different jobs, such as law, nursing, and software. Judges compare two answers side by side without knowing which model wrote them, and the winner gains rating points. A typical human expert scores 1000, so a higher number means the work was picked over a human more often.
Independently measured by Artificial Analysis.
Knowledge
GPQA Diamond
PhD-level science questions written so you cannot just Google the answer. Tests whether the model can reason about hard science.
Independently measured by Artificial Analysis.
Humanity's Last Exam
PhD-level questions across many subjects. Tests deep reasoning on the hardest questions humans can ask.
Independently measured by BenchLM.
Software Engineering
SWE-bench Verified
Hands the AI bugs from actual software projects and counts how many it fixes. Like a coding job interview, but with real work.
Provider-reported; no independent run recorded yet.
Terminal-Bench 2.1
Puts the AI in front of a computer terminal and asks it to finish multi-step tasks on its own. Measures how good an "AI agent" it is.
Provider-reported; an independent run by Vals AI (Terminus 2) lands at 74.53%.
SWE-bench Pro
The harder version of the coding test. Bigger codebases, trickier bugs. Scores drop for everyone, so the gaps between models become clearer.
Provider-reported; no independent run recorded yet.
Reasoning
Artificial Analysis Intelligence Index
A frequently refreshed overall score made from nine modern tests: real work, tool use, terminal tasks, science, hard questions, and long-context reasoning. It is a scorecard rather than a percent correct.
Independently measured by Artificial Analysis.
Why Choose Claude Sonnet 5?
Sonnet 5 is the best all-rounder for teams on a budget. It can plan and execute multi-step workflows autonomously, reason through complex problems, and maintain 1M-token context. At intro pricing ($2/$10), it's unbeatable value.
How It Compares
vs Claude Haiku 4.5
Sonnet is significantly more capable; Haiku is 5x cheaper and better for simple tasks.
vs GPT-5.6 Terra
Sonnet now costs less at intro pricing; Terra is strong but Sonnet edges it on autonomy.
Release History
🆕 NewJune 30, 2026
Claude Sonnet 5 released
New Sonnet model with autonomous planning, multi-step tool use, and 1M token context. Available at intro pricing.