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Claude Opus 5 Fast

Tools
anthropic/claude-opus-5-fast

Vision · 1M context · Jul 2026 · 4 upstreams

Claude Opus 5 Fast is the fast-mode variant of Anthropic's Claude Opus 5, tuned for higher output speed. It has the same capabilities and a 1,000,000-token context window, with tool use and text, image and file input.

Needs your own keyTo use Claude Opus 5 Fast, add a key from OpenRouter, Vercel AI Gateway, Venice or 1 more. AnyRouter adds no fee.
context
1M
input / 1M (list)
$10.00
output / 1M (list)
$50.00
routes
4
speed, 24h
No data yet

Upstreams

4
  1. 1OpenRouterYour keynot addedBilled to your key
  2. 2Vercel AI GatewayYour keynot addedBilled to your key
  3. 3Venice AIYour keynot addedBilled to your key
  4. 4InfronYour keynot addedBilled to your key

Quick start

curl
curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "anthropic/claude-opus-5-fast",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'

Details

Owner
Anthropic
Kind
Vision
Released
Jul 2026
Context
1M
Data policy
Provider retention
Endpoint
/api/v1/chat/completions