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LLMS • CURATED • UPDATED JUN 30, 2026

Claude Sonnet 5

Anthropic's cheaper, near-Opus everyday model

Claude Sonnet 5 is Anthropic's mid-tier model released June 30, 2026, replacing Sonnet 4.6 as the default model on Claude.ai's Free and Pro plans. It plans, uses tools like browsers and terminals, and runs autonomously, with performance approaching Claude Opus 4.8 on reasoning, tool use, coding, and knowledge work at a fraction of the cost. It also checks its own output without being explicitly asked to.

QUICK FACTS

Pricing Freemium
Platforms web, api
API No
Open Source No
Modalities LLMs, IDEs & Coding Tools
Best For Best for Everyday Agentic Work
Date Added 2026-06-30

QUICK TIPS

1 Use it as your default before reaching for Opus — it closes most of the performance gap at much lower cost
2 Take advantage of its autonomous tool use for multi-step agentic tasks
3 Let it self-check output on complex tasks rather than re-prompting immediately
4 Compare launch pricing against post-August 2026 standard pricing when budgeting
5 Pair with Opus 4.8 for the hardest subtasks in a larger agentic pipeline

SIMILAR TOOLS

Claude Opus 4.6 Google Antigravity 2.0 NotebookLM Cursor 2.0 OpenAI Codex

USE CASE EXAMPLES

Autonomous Multi-Step Agent Task

Let Sonnet 5 plan and execute a task using browser and terminal tools.

STEPS:
  1. Describe the end goal and constraints
  2. Let Sonnet 5 draft a plan
  3. Approve or adjust the plan
  4. Let it execute using tool calls
  5. Review the self-checked final output

Cost-Efficient Coding Assistant

Use Sonnet 5 as a daily coding assistant instead of a pricier Opus-tier model.

STEPS:
  1. Connect Sonnet 5 via API or Claude Code
  2. Describe the coding task
  3. Review generated changes
  4. Iterate with follow-up prompts
  5. Reserve Opus 4.8 only for the hardest subtasks

PRICING

Freemium Free tier available

Free tier includes limited features. Paid plans unlock full access, higher usage limits, and commercial usage rights.

📚

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EXPLORE ALTERNATIVES

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FREQUENTLY ASKED QUESTIONS

Q

Is Claude Sonnet 5 free?

A

Claude Sonnet 5 offers a free tier with optional paid upgrades.

Q

Does Claude Sonnet 5 have an API?

A

No, Claude Sonnet 5 does not appear to offer a public API.

Q

What is Claude Sonnet 5 best for?

A

Claude Sonnet 5 is best for Best for Everyday Agentic Work.

Q

What platforms does Claude Sonnet 5 support?

A

Claude Sonnet 5 supports web, api.

Q

Is Claude Sonnet 5 open source?

A

No, Claude Sonnet 5 is not open source.

Q

What can I do with Claude Sonnet 5?

A

Claude Sonnet 5 is designed for Everyday agentic tasks, Cost-efficient tool use and coding, Default Claude.ai experience. Claude Sonnet 5 is Anthropic's mid-tier model released June 30, 2026, replacing Sonnet 4. Key strengths include Near-Opus 4.8 performance at a significantly lower price and Strong autonomous tool use — browsers, terminals, multi-step plans.

Q

How do I use Claude Sonnet 5?

A

Claude Sonnet 5 is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses. It excels at near-opus 4.8 performance at a significantly lower price.