VerdictPal
Join

Models / OpenAI

GPT-5.6 Luna

GPT-5.6 · Released 2026-07-09

OpenAI's fastest and most cost-efficient generally available GPT-5.6 model, aimed at high-volume work and priced at $1 / $6 per 1M tokens.

GPT-5.6 tier for high-volume sub-agent, extraction, routing, and everyday coding workloads.

#24 of 168 on AA Index · current snapshot
52 AA Index · 10 benchmark rows · 2 sourcesPosition is benchmark-specific — not a cross-family or cross-source ranking.
Composite54
ContextUnlisted
Input / 1M$1.0
Output / 1M$6.0
Knowledge cutoffunpublished
Output speed123 t/s
TTFT (default API)83.33s
Statussolid

Family profile

Best published score in each covered benchmark family.

76/100 avg
Reasoning
91
Coding
53
Agentic
81
Long context
78

4 tested benchmark families

Editor's note
Luna moved from limited preview to general availability on July 9, 2026. Independent benchmark rows now cover the family, while OpenAI still has not published the context limit.
Benchmark placements

Where GPT-5.6 Luna places on each public benchmark source that publishes a row. Rank counts every model with a latest row in the same test — not a universal quality score.

BenchmarkFamilyRankScoreSourceDate
AA time to first tokenPerformance#5/ 186Artificial Analysis2026-09-01
Terminal-Bench-ScienceAgentic#9/ 93Terminal-Bench-Science 0.1 announcement2026-08-27
AA-LCRLong context#17/ 17978Artificial Analysis2026-09-01
Terminal-BenchAgentic#21/ 18481Artificial Analysis2026-09-01
Artificial Analysis Intelligence IndexReasoning#28/ 18752Artificial Analysis2026-09-01
AA output speedPerformance#29/ 187Artificial Analysis2026-09-01
SciCodeCoding#30/ 18053Artificial Analysis2026-09-01
GPQA DiamondReasoning#31/ 18591Artificial Analysis2026-09-01
τ³-Bench BankingAgentic#35/ 10631Artificial Analysis2026-09-01
Humanity's Last ExamReasoning#38/ 18040Artificial Analysis2026-09-01
Family context

The three highest-scoring models with pages in each capability family. Where GPT-5.6 Luna shows up, it's highlighted.

ReasoningGPT-5.6 Luna · 91
  1. 1
    Claude Mythos Preview
    95
  2. 2
    Gemini 3.7 Flash
    95
  3. 3
    Grok 4.6
    95
CodingGPT-5.6 Luna · 53
  1. 1
    GPT 5.5
    96
  2. 2
    Claude Opus 4.8
    96
  3. 3
    Claude Opus 4.6
    96
AgenticGPT-5.6 Luna · 81
  1. 1
    GPT 5.5
    100
  2. 2
    Claude Opus 4.8
    100
  3. 3
    Claude Fable 5
    100
Long contextGPT-5.6 Luna · 78
  1. 1
    Muse Spark 1.2
    83
  2. 2
    Kimi K3
    83
  3. 3
    Gemini 3.5 Flash
    81
Newest receipts

Benchmark rows added to the public ledger for GPT-5.6 Luna in the last 120 days. Older rows live in the full table below.

10 recent
BenchmarkFamilyScoreSourceDays ago
AA-LCRLong context78.33%Artificial Analysis5
AA output speedPerformance123 t/sArtificial Analysis5
AA time to first tokenPerformance83.33sArtificial Analysis5
Artificial Analysis Intelligence IndexReasoning52.3%Artificial Analysis5
GPQA DiamondReasoning91.1%Artificial Analysis5
Humanity's Last ExamReasoning39.5%Artificial Analysis5
SciCodeCoding52.5%Artificial Analysis5
τ³-Bench BankingAgentic31.13%Artificial Analysis5
Terminal-BenchAgentic80.9%Artificial Analysis5
Terminal-Bench-ScienceAgentic3.3%Terminal-Bench-Science 0.1 announcement10
Family coverage

A high composite that hides a weak family is a trap. These bars surface the families where this model hasn't been publicly tested, and where it leads.

Reasoning91
Coding53
Agentic81
Long context78
Price vs. performance
0255075100$0.10$0.30$1$3$10$30input USD / 1M tokens · log scale →← intelligence

Hover any dot for name, score, and input price. Keyboard: tab through the top twelve, or use the ranking below.

AnthropicOpenAIMistralAlibabaDeepSeekGoogleMoonshotMetaMiniMaxxAIZhipuXiaomiOtherMeituanCohereNVIDIA

Full benchmark ledger

Every catalog benchmark for GPT-5.6 Luna. Scores link to the original source; gaps mean no public row exists yet.

10 sourced rows

10 of 37 catalog benchmarks have a sourced row for GPT-5.6 Luna.

Reasoning

Coding

Agentic

Long context

Performance

Changelog
  1. Recorded general availability across ChatGPT, Codex, and the API and refreshed benchmark evidence.
  2. Updated public pricing: Luna is listed at $1 input / $6 output per 1M tokens.
  3. Previewed as the fastest and most cost-efficient GPT-5.6 tier.
Sources