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GPT-5.6 Luna API Pricing — $0.20/M input, $1.20/M output

GPT-5.6 model optimized for cost-sensitive, high-volume, and latency-sensitive tasks.

Input
$0.20/M
Output
$1.20/M
Blended
$0.45/M
Provider
Verified 2026-07-30source

Speed

Tokens / sec
126
TTFT
300 ms
Rank
#11 of 31
$ / M ÷ t/s
$0.0036
Measured with 5 runs on a fixed prompt — see the full methodology.

Cost at scale

Tokens / monthEst. cost (blended 3:1)
100,000$0.04
1,000,000$0.45
10,000,000$4.50
100,000,000$45.00

How GPT-5.6 Luna compares

GPT-5 Nano$0.14/MGPT-4o Mini$0.26/MGPT-5.4 Nano$0.46/MGPT-5 Mini$0.69/MGPT-5.4 Mini$1.69/MCodestral$0.45/MGPT-OSS 120B (Cerebras)$0.45/MGPT-5.4 Nano$0.46/M
See all OpenAI models →

Head-to-head comparisons

GPT-5.6 Luna vs DeepSeek V4 ProGPT-5.6 Luna vs GPT-4o MiniGPT-5.6 Luna vs GPT-OSS 120BGPT-5.6 Luna vs DeepSeek V4 Flash

FAQ

Is GPT-5.6 Luna cheaper than Codestral?

GPT-5.6 Luna costs $0.45/M blended tokens, Codestral costs $0.45/M — Codestral is cheaper.

How much does 1 million tokens cost with GPT-5.6 Luna?

At a 3:1 input:output ratio, 1 million blended tokens costs approximately $0.45. Pure input costs $0.20/M; pure output costs $1.20/M.

Who provides GPT-5.6 Luna?

GPT-5.6 Luna is served by OpenAI. Pricing was last verified on 2026-07-30 against https://openai.com/api/pricing.

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