claude-opus-5-5 open weights and deployment

Status: Unavailable. Anthropic publishes no Claude Opus 5.5 weights. The model is available on the Claude API, Amazon Bedrock, Google Cloud, Microsoft Foundry and Claude Platform on AWS.

Need to self-host? Open-weight alternatives: deepseek-flash, glm-5.3-flash.

License
Proprietary hosted model
Hardware note
Not applicable
Recommended runtime
ChinaAPI or the Claude API
Verified date
2026-09-24

Published model card

Parameter count
Not disclosed
Context window
1M tokens
Maximum output
128K tokens (up to 300K on the Message Batches API with a beta header)
Input/output modalities
Text and image input; text output

Official sources