>export ANTHROPIC_API_KEY="sk-ant-ap01..."

export ANTHROPIC_BASE_URL="https://apiarena.dev/v1/"<

>export OPENAI_API_KEY="sk-proj-op99..."

export OPENAI_BASE_URL="https://apiarena.dev/v1/"<

>curl -X POST "https://apiarena.dev/v1/chat/completions"

cat ~/.bashrc | grep API_KEY<

>source ~/.bashrc

# env config loaded successfully<

>GET /v1/models (authentic_probes_active)

POST /v1/embeddings [200_OK_VERIFIED]<

>export APIARENA_PROXY_PORT=3030

[APIArena_Routing_Active]<

Wire probes

Model authenticity

Deterministic fingerprints at temperature 0 against official OpenAI and Anthropic endpoints. If a gateway's GPT-5.5 or Opus 4.8 route doesn't match, we publish the verdict.

Methodology v2 (mock data). 20 prompts · deterministic match · tokenizer + refusal + cutoff corroboration. Full design in methodology. Prompt text is not published (anti-gaming).

SUSPECT3 gateways

SUSPICIOUS4 gateways

LIKELY10 gateways

AUTHENTIC3 gateways

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