Claude Sonnet 5.5
Anthropic launched Claude Sonnet 5.5 as a new model version. It is available through the Claude API and several cloud platforms.
What it does
Developers can use Claude Sonnet 5.5 through supported APIs and cloud platforms to build applications that use Claude.
- Availability
- Available on the Claude API, Claude in Amazon Bedrock, Claude Platform on AWS, Claude on Google Cloud, and Claude in Microsoft Foundry.
- Pricing model
- $0.10 USD per million tokens for prompt cache reads; 0.05x base input price
- Deployment
- Available through the Claude API and named cloud platforms.
- Privacy
- Thinking blocks work only in the account that produced them or an account linked to it.
- Licence
- Not established
Capability
Modality
Access
Deployment
Pricing
Target user
Evidence
9 claims- Prompt cache reads on Claude Sonnet 5.5 cost $0.10 USD per million tokens. [1]
We've lowered the price of prompt cache reads on Claude Sonnet 5.5 from $0.20 USD to $0.10 USD per million tokens: 0.05x the base input price instead of 0.1x.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - The prompt cache read price is 0.05 times the base input price. [1]
We've lowered the price of prompt cache reads on Claude Sonnet 5.5 from $0.20 USD to $0.10 USD per million tokens: 0.05x the base input price instead of 0.1x.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - The previous prompt cache read price was $0.20 USD per million tokens. [1]
We've lowered the price of prompt cache reads on Claude Sonnet 5.5 from $0.20 USD to $0.10 USD per million tokens: 0.05x the base input price instead of 0.1x.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - Cache writes and all other prices are unchanged. [1]
Cache writes and all other prices are unchanged.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - Claude Sonnet 5.5 is available on the Claude API, Amazon Bedrock, AWS, Google Cloud, and Microsoft Foundry. [2]
It’s available on the Claude API, Claude in Amazon Bedrock , Claude Platform on AWS , Claude on Google Cloud , and Claude in Microsoft Foundry .
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - At high effort or below, turning off up-front thinking requires sending thinking: {"type": "between_tools"} instead of "disabled". [2]
To turn off up-front thinking, send thinking: {"type": "between_tools"} instead of "disabled" , at high effort or below.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - Forced tool use with tool_choice types any and tool returns a 400 error. [2]
Forced tool use ( tool_choice types any and tool ) returns a 400 error.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - Thinking blocks produced by Claude Sonnet 5.5 work only in the account that produced them or an account linked to it. [2]
Thinking blocks that Claude Sonnet 5.5 produces work only in the account that produced them, or in an account linked to it.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights. - On the Claude API and Google Cloud, the earlier computer_20251124 computer use tool is not accepted. [2]
On the Claude API and Google Cloud, the earlier computer_20251124 computer use tool isn’t accepted.
Anthropic. Quoted text is outside CC BY 4.0 and keeps its original rights.
Sources
2
1
AnthropicOwner-controlled
https://docs.claude.com/en/release-notes/overview#2026-10-07
Retrieved 2026-10-07 21:25 UTC
Verified
2
AnthropicOwner-controlled
https://docs.claude.com/en/release-notes/overview#2026-09-28
Retrieved 2026-10-28 00:02 UTC
Verified
Versions
4| Version | Effective | Change | Changed fields | State |
|---|---|---|---|---|
| 4 | 2026-10-28 00:02 UTC | material change | capability, deployment, privacy | Current |
| 3 | 2026-10-24 01:40 UTC | material change | pricing, availability, deployment, privacy | Current |
| 2 | 2026-10-07 21:25 UTC | major release | pricing, pricing model, release | Current |
| 1 | 2026-09-28 20:12 UTC | publication | None | Current |
In briefs
2- Liquid AI’s decision models classify inputs without writing a response Daily brief 2026-10-07
- ElevenLabs introduces two text-to-speech models Daily brief 2026-09-28
Original catalog content is licensed under CC BY 4.0, attributed to wowsuchai. Source quotations and linked content keep their original rights.