Anthropic releases Claude Sonnet 5, "the most agentic Sonnet yet"
Claude Sonnet 5 (`claude-sonnet-5`) launched on June 30, 2026 at $2/$10 per million tokens. Anthropic said it performs close to Opus 4.8 at Sonnet cost. It became the default for Free and Pro users on July 1.
Key facts
- Released June 30, 2026; model id claude-sonnet-5; context 1M, 128K output
- Price $2 input / $10 output per 1M tokens (introduced as through-Aug-31 pricing; Anthropic's page says it was made permanent Aug 10, 2026)
- Humanity's Last Exam with tools: 51.2% vs Sonnet 4.6's 46.8% (Anthropic)
- Default model for Free and Pro plans from July 1, 2026, replacing Sonnet 4.6
- Cyber safeguards enabled by default
What happened
Sonnet 5 can make plans, use browsers and terminals, run autonomously, and check its own output without being asked. It is on the Claude API, Claude Platform on AWS, Bedrock and Microsoft Foundry, with Google Cloud following. Anthropic reported lower hallucination and sycophancy rates than Sonnet 4.6.
Why it matters
It moved Opus-4.8-class agentic ability to the default free tier just weeks after Mythos-class models reached the public.
Changelog
- 2026-09-29: created
Videos (8)
I Tested NEW Sonnet 5 with 25 Coding Prompts
AI Coding Daily · 2026-07-31 · reviewPovilas Korop from AI Coding Daily tests Anthropic’s Claude Sonnet 5 on his 5-project, 25-prompt LLM coding benchmark suite. He evaluates the model across React, Laravel API, Fluent Validation, Filament Admin, and CSV import tasks, comparing its performance and execution costs directly against Claude Sonnet 4.6 and…
NEW Claude Sonnet 5 vs Opus 4.8! (Full Review)
AI Foundations · 2026-07-31 · reviewDrake from AI Foundations reviews Anthropic's newly released Claude Sonnet 5, comparing its benchmark results, pricing, and agentic coding capabilities directly against Claude Opus 4.8 and Claude Sonnet 4.6. He pits Sonnet 5 against Opus 4.8 side by side inside Claude Code using the /goal command to build an…
Claude Sonnet 5 just dropped. I'm changing how I use AI...
Alex Finn · 2026-07-31 · communityAlex Finn reviews Anthropic's newly released Claude Sonnet 5, evaluating its benchmark performance, pricing, and agentic coding capabilities. He compares its 3D graphics generation against ChatGPT 5.5, outlines a cost-saving hybrid workflow pairing Claude Opus 4.8 for planning with Sonnet 5 for execution, and…
Claude Sonnet 5 Is HERE – Hands-On With Anthropic’s NEW Model!
Bijan Bowen · 2026-07-31 · communityIn this hands-on evaluation, presenter Bijan Bowen reviews Anthropic’s Claude Sonnet 5 alongside the Claude desktop app beta for Linux. Running benchmarks and interactive coding tests via Claude Code and the Claude web interface, Bowen examines how Sonnet 5 performs on complex 3D web applications, games, and agentic…
I’m freaking out about Sonnet 5
Mo Bitar · 2026-07-31 · communityMo Bitar presents a comedic and enthusiastic commentary reacting to Anthropic's release of Claude Sonnet 5 and the lifting of export controls on Claude Fable 5 and Mythos 5. He discusses the model's new tokenizer, pricing structure, and humorously reflects on humanity being automated away. - [00:01] A graphic…
Claude Sonnet 5 Just Dropped (I have to be honest...)
Productive Dude · 2026-07-31 · reviewIn this video, the creator behind the channel "Productive Dude" reviews Anthropic's release of Claude Sonnet 5. He analyzes the model's target use cases, benchmark performance, pricing structure, and safety evaluations based on Anthropic's launch blog post, concluding that it serves as an economical, agentic…
More videos (2)
- Claude Sonnet 5 IS OUT & ITS HORRIBLE! Worst Model By Anthropic EVER? (Fully Tested) WorldofAI · 2026-07-31
- Claude Sonnet 5: Greatest AI Coding Model Ever! 1M Context, Cheap, & More! (Early Test) WorldofAI · 2026-03-03
All videos with Gemini's descriptions: videos · llms-full.txt
Related events
- Anthropic releases Claude Sonnet 5.5 — 30% faster, Opus-5.5-level scores on several benchmarks at $2/$10 ★★★★
- Anthropic releases Claude Opus 4.8 with cheaper fast mode and Claude Code "dynamic workflows" ★★★
- Anthropic releases Claude Sonnet 4.6 ★★
Sources (5)
- officialIntroducing Claude Sonnet 5 (Anthropic)
- paperClaude Sonnet 5 System Card
- docsClaude Sonnet 5 docs overview
- pressTechCrunch: Claude Sonnet 5 as a cheaper way to run agents
- pressMacRumors: Sonnet 5 with near-Opus performance
id: 2026-06-30-claude-sonnet-5 · updated 2026-09-29 · open in the interactive timeline