RouterLab
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OpenAIAvailable

GPT 5.6 Luna API

RouterLab publishes this OpenAI model under the model ID gpt-5.6-luna. The facts below come from the active RouterLab catalog.

Model ID

gpt-5.6-luna

OpenAI-compatible APIClaude Messages API

Context window

922,000 tokens

Maximum output

128,000 tokens

Input / 1M tokens

$0.20

Output / 1M tokens

$1.20

Cache read / 1M tokens

$0.02

Cache write / 1M tokens

$0.25

Cache read reuses tokens already stored in the provider cache. Cache write creates or stores new cache tokens.

Catalog capabilities

  • Vision input
  • Tool calling
  • Structured output
  • Reasoning

Minimal API request

curl https://api.routerlab.ch/v1/chat/completions \
  -H "Authorization: Bearer $ROUTERLAB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.6-luna","messages":[{"role":"user","content":"Hello RouterLab"}]}'