OpenRouterClaude Opus 4.8 (Fast) model ID, context window & pricing
claude-opus
Quick facts
Model ID anthropic/claude-opus-4.8-fast
Source OpenRouter
Context Window 1000000
Pricing $10.00 input / $50.00 output per 1M tokens
Capabilities tool calling, reasoning, structured output
Model overview
Claude Opus 4.8 (Fast) is an AI model from OpenRouter with 1000000 token context window and text, image, pdf input support.
Published pricing is $10.00 input and $50.00 output per 1M tokens.
- Workloads that use text, image, pdf inputs with text outputs.
- Agent and tool workflows that need function calling.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID anthropic/claude-opus-4.8-fast
Provider OpenRouter
Family claude-opus
Status -
Knowledge Cutoff -
Release Date 2026-05-27
Input Modalities text, image, pdf
Output Modalities text
Context Window 1000000
Input Limit -
Output Limit 128000
Tool Calling Yes
Reasoning Yes
Structured Output Yes
Temperature Control No
Open Weights No
Input Cost / 1M tokens $10.00
Output Cost / 1M tokens $50.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $1.00
Cache Write Cost / 1M tokens $12.50