MDL
GPT-5.6 Luna
OpenAI
Verified against Artificial Analysis · Jul 27, 2026
Capability
94
percentile index
Price /M
$1 / $6
in / out
Context
1.1M
tokens
Avg score
61.2
4 benchmarks
AA Intelligence
49.1
index
Speed
161 tok/s
TTFT 36s
Released
Jul 9, 2026
About
GPT-5.6 Luna is a proprietary model in the GPT family from OpenAI. Benchmarked on 4 evals, averaging 61.2.
Benchmark scores · 4
avg 61.2 — higher is betterPerformance & price
Output speed161 tok/s
Latency (TTFT)36s
Price in / out$1 / $6 per 1M
Blended price$2.25 / 1M
Coding index68.6
Median across API providers, via Artificial Analysis. Blended = 3:1 input:output. For reasoning models, latency includes thinking time. Methodology →
History
full ledger →Capability over time
GPQA Diamondfirst seen at 89.5
15d ago
Humanity's Last Examfirst seen at 35.6
15d ago
SciCodefirst seen at 50
15d ago
AA Long-Context Reasoningfirst seen at 69.7
15d ago
Append-only ledger — every observed change to this model's numbers.
API providers
Artificial Analysis$6/M