ANAnthropic/ Claude
Claude Opus 5 (Fast)
anthropic/claude-opus-5-fast
Fast-mode variant of [Opus 5](/anthropic/claude-opus-5) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Model information
Released
2026-07-24
Context window
1M
Max output
128K
Weights
Closed
Modalities
Input
DocumentImageText
Output
Text
Identity
- Version
- claude-opus-5-fast
Capabilities
ReasoningStructuredTool call
Providers
| Provider | Provider model ID | Protocol | Context | Max output | Input | Output | Capabilities | Notes | Pricing | Streaming |
|---|---|---|---|---|---|---|---|---|---|---|
| OpenRouter | anthropic/claude-opus-5-fast | openai_chat | 1M | 128K | AttachmentsReasoningTool callStructured | Moderated, Reasoning levels: max, xhigh, high, medium, low, Default reasoning: high | input $10/M · output $50/M cache read $1/M · cache write $12.5/M | Yes | ||
| Kilo Gateway | anthropic/claude-opus-5-fast | openai_chat | 1M | 128K | AttachmentsReasoningTool callStructured | - | input $10/M · output $50/M cache read $1/M · cache write $12.5/M | Yes | ||
| Vercel AI Gateway | anthropic/claude-opus-5-fast | openai_chat | 1M | 128K | AttachmentsReasoningTool call | - | input $10/M · output $50/M cache read $1/M · cache write $12.5/M | Yes | ||
| Anthropic | claude-opus-5-fast | custom | 1M | 128K | - | - | - | Yes |