Overview
Claude Sonnet 5 is Anthropic's mid-tier model released on June 30, 2026. Anthropic frames it as a more powerful and agentic version of the Sonnet line: it can make plans, use tools like browsers and terminals, and run autonomously across multi-step tasks. On the Claude API the effort parameter defaults to high on Sonnet 5.
It ships with a 1 million-token context window and up to 128K output tokens on the synchronous Messages API. Modalities are text and image (vision). Adaptive thinking is always on; extended (visible) thinking is not exposed on this model. Anthropic positions Sonnet 5 as approaching Opus 4.8 on agentic search and computer-use evaluations at meaningfully lower cost.
Pricing is $3 per million input tokens and $15 per million output tokens at the standard rate, with an introductory rate of $2 input and $10 output per million tokens through August 31, 2026. The model is generally available on the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, and Microsoft Foundry, and is the default model for Free, Pro, Max, Team, and Enterprise plans on claude.ai and in Claude Code.
| Released | 2026-06-30 |
|---|---|
| License | Proprietary |
| Weights | API only |
| Context | 1M |
| Max output | 128K |
| Architecture | Proprietary transformer with adaptive thinking (always on). |
| Knowledge cutoff | Jan 2026 |
| Modalities | Text, Vision |
| Status | Generally available |
Pricing
| Input | $3.00 per million tokens |
|---|---|
| Output | $15.00 per million tokens |
Introductory pricing of $2 input / $10 output per million tokens applies through August 31, 2026.
Strengths
- Stronger autonomous planning and multi-step tool use than Sonnet 4.6
- Browser and terminal tool-use for computer-use and coding agents
- 1M-token context window with 128K max output on the synchronous Messages API
- Adaptive thinking with effort parameter defaulting to high on the API and Claude Code
- Priced well below Opus 4.8 on agentic-heavy workloads
Best for
- Long-horizon agent workflows that plan, browse, and self-verify without step-by-step prompting
- Coding agents that run terminal commands and iterate over large codebases
- Computer-use and browser automation at production cost
- Default assistant for Claude Free/Pro/Max/Team/Enterprise plans and Claude Code
How to access
| Provider | Model ID |
|---|---|
| Anthropic API ↗ | claude-sonnet-5 |
| Amazon Bedrock ↗ | anthropic.claude-sonnet-5 |
| Google Vertex AI ↗ | claude-sonnet-5 |
Claude Sonnet — every version
The full lineage of the Claude Sonnet line, newest first. Every version has its own page — click any to compare specs, benchmarks and pricing.
| Version | Released | Context | License |
|---|---|---|---|
| Claude Sonnet 5current | 2026-06-30 | 1M | Proprietary |
| Claude Sonnet 4.6 | 2026-02-17 | 1M | Proprietary |
| Claude Sonnet 4.5 | 2025-09-29 | 1M | Proprietary |
| Claude Sonnet 4 | 2025-05-22 | 200K | Proprietary |
| Claude 3.7 Sonnet | 2025-02-24 | 200K | Proprietary |
| Claude 3.5 Sonnet (new) | 2024-10-22 | 200K | Proprietary |
| Claude 3.5 Sonnet | 2024-06-20 | 200K | Proprietary |
| Claude 3 Sonnet | 2024-03-04 | 200K | Proprietary |
FAQ
When was Claude Sonnet 5 released?
Anthropic released Claude Sonnet 5 on June 30, 2026. It became the default model on Free, Pro, Max, Team, and Enterprise plans at launch and is available across the Claude API, Claude Platform on AWS, Amazon Bedrock, Google Cloud, and Microsoft Foundry.
How much does Claude Sonnet 5 cost?
Standard pricing is $3 per million input tokens and $15 per million output tokens. Anthropic is running an introductory rate of $2 input and $10 output per million tokens through August 31, 2026.
What is the context window of Claude Sonnet 5?
Claude Sonnet 5 has a 1 million token context window and supports up to 128K output tokens on the synchronous Messages API. Reliable knowledge is through January 2026.
What is the model ID for Claude Sonnet 5?
On the Claude API and Google Vertex AI the model ID is claude-sonnet-5. On Amazon Bedrock it is anthropic.claude-sonnet-5.
How does Claude Sonnet 5 compare to Opus 4.8?
Anthropic positions Sonnet 5 as approaching Opus 4.8 on agentic search and computer-use evaluations at meaningfully lower per-token cost, while Opus 4.8 remains the more capable model for the hardest reasoning tasks.