---
id: "anthropic/claude-opus-5-fast"
also: ["anthropic/claude-opus-5-fast-20260723", "vercel/anthropic/claude-opus-5-fast"]
card_usd_per_m: "10.0 in, 50.0 out, at anthropic"
cheapest_list_usd_per_m: "5.0 in, 25.0 out, at anthropic on vercel"
cheapest_effective_usd_per_m: "1.8633 in, 50.0 out, at anthropic on openrouter"
context: 1000000
max_output: 128000
input: ["text", "image", "file"]
output: ["text"]
released: "2026-07-24"
reasoning: ["max", "xhigh", "high", "medium", "low"]
params: ["include_reasoning", "max_tokens", "reasoning", "reasoning_effort", "response_format", "stop", "structured_outputs", "tool_choice", "tools", "verbosity"]
endpoints: 2
gateways: "openrouter (1), vercel (1)"
no_training: 2
trains: 0
retains_prompts: 1
---
# Claude Opus 5 (Fast)

Claude Opus 5 is the latest model in Anthropic's Opus family and a step-change improvement over Opus 4.8. It delivers major gains over Opus 4.8 in agentic coding, professional knowledge work, and long-horizon reasoning, and it is stronger per token across effort levels.