# GPT-5.6 Luna (low reasoning effort) Benchmark Scores & Performance

> GPT-5.6 Luna (low reasoning effort) by OpenAI has 2 source-displayable benchmark rows but no public overall score. It remains unranked.

Canonical page: https://benchlm.ai/models/jevbench-gpt-5-6-luna

Last updated: September 30, 2026

## Model Details

| Property | Value |
|----------|-------|
| Creator | OpenAI |
| Source Type | Proprietary |
| Reasoning Type | Reasoning |
| Context Window | Coming soon |
| Overall Score | Coming soon |
| Overall Rank | Unranked |

## Family & Coverage

- Family: GPT-5.6 Luna (low reasoning effort)
- Variant: decision-system
- Benchmarks covered: 2 of 495
- Coverage note: BenchLM currently has partial benchmark coverage for this model, so the overall score is conservative.

## Reasoning Benchmarks

| Benchmark | Score |
|-----------|-------|
| [JevBench 1.4](/benchmarks/jevbench-1-4) | 18.51 |
| [JevBench 1.5](/benchmarks/jevbench-1-5) | 22.37 |

## Other OpenAI Models

- [GPT-6 Astra](/models/gpt-6-astra) - Score: 88.69
- [GPT-6 Sol](/models/gpt-6-sol) - Score: 79.16
- [GPT-5.6 Sol](/models/gpt-5-6-sol) - Score: 78.91
- [GPT-6.1 Sol](/models/gpt-6-1-sol) - Score: 77.55
- [GPT-5.5 Pro](/models/gpt-5-5-pro) - Score: 74.62
- [GPT-5.6 Terra](/models/gpt-5-6-terra) - Score: 73.18
- [GPT-5.4 Pro](/models/gpt-5-4-pro) - Score: 70.72
- [GPT-5.5](/models/gpt-5-5) - Score: 69.38
- [GPT-5.4](/models/gpt-5-4) - Score: 68.89
- [GPT-5.2 Pro](/models/gpt-5-2-pro) - Score: 68.23
- [GPT-5.6 Luna](/models/gpt-5-6-luna) - Score: 66.2
- [GPT-6 Luna](/models/gpt-6-luna) - Score: 64.95
- [GPT-5.3 Codex](/models/gpt-5-3-codex) - Score: 62.46
- [GPT-5.2](/models/gpt-5-2) - Score: 61.92
- [GPT-5.1](/models/gpt-5-1) - Score: 58.95
- [GPT-5.2-Codex](/models/gpt-5-2-codex) - Score: 56.74
- [GPT-5.4 mini](/models/gpt-5-4-mini) - Score: 55.63
- [GPT-5.4 nano](/models/gpt-5-4-nano) - Score: 51.44
- [GPT-5.1-Codex](/models/gpt-5-1-codex) - Score: 51
- [o3-pro](/models/o3-pro) - Score: 47.88
- [o3](/models/o3) - Score: 47.72
- [GPT-5 (medium)](/models/gpt-5-medium) - Score: 47.05
- [GPT-5 mini](/models/gpt-5-mini) - Score: 44.75
- [o3-mini](/models/o3-mini) - Score: 40.84
- [o1](/models/o1) - Score: 40.06
- [GPT-4.1](/models/gpt-4-1) - Score: 39.28
- [GPT-OSS 120B](/models/gpt-oss-120b) - Score: 38.37
- [GPT-5 nano](/models/gpt-5-nano) - Score: 37.08
- [o1-preview](/models/o1-preview) - Score: 36.97
- [o1-pro](/models/o1-pro) - Score: 36
- [GPT-OSS 20B](/models/gpt-oss-20b) - Score: 34.27
- [GPT-4.1 mini](/models/gpt-4-1-mini) - Score: 31.12
- [GPT-4o](/models/gpt-4o) - Score: 30.04
- [GPT-4o mini](/models/gpt-4o-mini) - Score: 27.57
- [GPT-4.1 nano](/models/gpt-4-1-nano) - Score: 26.42
- [GPT-4 Turbo](/models/gpt-4-turbo) - Score: 22.31
- [GPT-5.1-Codex-Max](/models/gpt-5-1-codex-max) - Score: not computed
- [o4-mini (high)](/models/o4-mini-high) - Score: not computed
- [GPT-5.2 Instant](/models/gpt-5-2-instant) - Score: not computed
- [GPT-5.3 Instant](/models/gpt-5-3-instant) - Score: not computed
- [GPT-5 (high)](/models/gpt-5-high) - Score: not computed
- [GPT-5.3-Codex-Spark](/models/gpt-5-3-codex-spark) - Score: not computed
- [GPT-6 Luna (default medium reasoning effort)](/models/jevbench-gpt-6-luna) - Score: not computed
- [GPT-6 Luna (low reasoning effort)](/models/jevbench-gpt-6-luna-low) - Score: not computed
- [GPT-Live-1](/models/gpt-live-1) - Score: not computed
- [GPT-5.6 Cyber](/models/gpt-5-6-cyber) - Score: not computed
- [GPT Live Transcribe](/models/gpt-live-transcribe) - Score: not computed
- [GPT Transcribe](/models/gpt-transcribe) - Score: not computed
- [GPT Realtime 2.1](/models/gpt-realtime-2-1) - Score: not computed
- [GPT Realtime 2.1 Mini](/models/gpt-realtime-2-1-mini) - Score: not computed
- [GPT Audio 1.5](/models/gpt-audio-1-5) - Score: not computed
- [GPT Realtime 1.5](/models/gpt-realtime-1-5) - Score: not computed
- [GPT-4o mini TTS](/models/gpt-4o-mini-tts) - Score: not computed
- [GPT Realtime](/models/gpt-realtime) - Score: not computed
- [GPT Realtime 2](/models/gpt-realtime-2) - Score: not computed
- [GPT Realtime mini](/models/gpt-realtime-mini) - Score: not computed
- [GPT-4o Audio](/models/gpt-4o-audio) - Score: not computed
- [GPT-4o mini Audio](/models/gpt-4o-mini-audio) - Score: not computed
- [Whisper large-v3-turbo](/models/whisper-large-v3-turbo) - Score: not computed