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OpenAI: Chat completions (GPT-4o, GPT-4, o1, etc.) - price varies by model

MPPai/llm402 seen 2026-10-18

Pay-per-call endpoint from OpenAI. Price per call: $0.0051 (USDC.e, MPP).

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Proof

endpoint (shown as text, not a link, to avoid accidental calls): https://openai.mpp.tempo.xyz/v1/chat/completions
“HTTP 402 + MPP Payment challenge (method=tempo): amount 5125 atomic units of USDC.e (= $0.005125)”
source: openai.mpp.tempo.xyz/v1/chat/completions

Details

Price per call
$0.0051 (USDC.e, MPP)
Provider
OpenAI
Protocol
MPP · USDC.e (Tempo)
Method
POST
Price basis
amount in the unpaid HTTP 402 Payment (MPP) challenge, USDC.e 6 decimals
Last probed
2026-10-18

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