GPT-5.4 Mini vs GPT-5.6 Luna
At a Glance
| Compare |  GPT-5.4 MiniOpenAI | GPT-5.6 LunaOpenAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | #35 of 5720.8 score · 3/3 sources · complete | UnrankedNot in the 57-model eligible cohort |
| CostLower is better · Published-token output estimate | #21 of 27$0.214 per LiveBench case | UnrankedNot in the 27-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.9 | #27 of 2721.6 score · 3/3 sources · complete | UnrankedNot in the 27-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $0.75Openai ↗ · Sep 3, 2026 | $0.20Openai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $4.50Openai ↗ · Sep 3, 2026 | $1.20Openai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 400K | 1,050K |
| Model facts checked | Sep 3, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | GPT-5.4 Mini | GPT-5.6 Luna |
|---|---|---|
| ARC-AGI-1verified-v1-613c385b0c93 · verified_score · leader | 63.6770% of row best · percent · GPT-5.4 Mini (XHigh) | 90.67100% of row best · percent · GPT-5.6 Luna 2026-07-30 (Max) |
| ARC-AGI-2verified-v2-be40992860f9 · verified_score · leader | 18.9032% of row best · percent · GPT-5.4 Mini (XHigh) | 59.58100% of row best · percent · GPT-5.6 Luna 2026-07-30 (Max) |
| LMArena Text Arenatext-2026-10-15-0ebb411abf00 · arena_rating · leader | 1,411.4599% of row best · rating · gpt-5.4-mini-high; 95% CI [1407.73358875, 1415.16901218]; votes 63449; rank 137 | 1,430.66100% of row best · rating · gpt-5.6-luna-xhigh; 95% CI [1426.38028671, 1434.93119450]; votes 41109; rank 93 |
| LMArena Vision Arenavision-2026-10-09-0ebb411abf00 · arena_rating · statistical tie | 1,245.0199% of row best · rating · gpt-5.4-mini-high; 95% CI [1238.81649273, 1251.21275945]; votes 25733; rank 68 | 1,258.24100% of row best · rating · gpt-5.6-luna-xhigh; 95% CI [1250.82216689, 1265.66350676]; votes 11086; rank 58 |
| LiveBench2026-06-25-90f8d44da965 · overall · leader | 69.5390% of row best · percent · gpt-5.4-mini-xhigh · 47,448 output tokens / case | 77.05100% of row best · percent · gpt-5.6-luna-max · 21,799 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 1 tie | 0 benchmark wins | 4 benchmark winsOverall lead |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | GPT-5.4 Mini | GPT-5.6 Luna |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Family | Gpt 5 4 | Gpt 5 6 |
| Model | GPT-5.4 Mini | GPT-5.6 Luna |
| Version | GPT-5.4 Mini | GPT-5.6 Luna |
| Lifecycle | active | active |
| Released | 2026-03-17 | Unknown |
| Knowledge cutoff | 2025-08-31 | 2026-02-16 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 400K | 1,050K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Openai (Standard), Openrouter (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, tools |
GPT-5.4 Mini Capabilities
GPT-5.6 Luna Capabilities
Related Comparisons
All image comparisons →| A | Pair | B | Context |
|---|---|---|---|
GPT-5.4 MiniOpenAI | vs |  Sonar ProPerplexity | cross-developer peerstext |
GPT-5.4 MiniOpenAI | vs | GPT-5.6 TerraOpenAI | family variantsimage, text |
Claude Opus 4.7Anthropic | vs | GPT-5.4 MiniOpenAI | cross-developer peersimage, text |
Seed 1.8ByteDance Seed | vs | GPT-5.4 MiniOpenAI | cross-developer peersimage, text |
 Gemini 3.6 FlashGoogle DeepMind | vs | GPT-5.4 MiniOpenAI | cross-developer peerstext |
Gemma 4 26B-A4BGoogle DeepMind | vs | GPT-5.4 MiniOpenAI | cross-developer peersimage, text |
GPT-5 MiniOpenAI | vs | GPT-5.4 MiniOpenAI | family variantsimage, text |
GPT-5.2 ProOpenAI | vs | GPT-5.4 MiniOpenAI | family variantsimage, text |
GPT-5.4 MiniOpenAI | vs | SonarPerplexity | cross-developer peerstext |
GPT-5.4 MiniOpenAI | vs |  Qwen3 VL PlusQwen | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
GPT-5.4 Mini vs GPT-5.6 Luna FAQs
Is GPT-5.4 Mini or GPT-5.6 Luna better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-5.4 Mini and GPT-5.6 Luna, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-5.4 Mini or GPT-5.6 Luna?+
GPT-5.4 Mini is $0.75 and GPT-5.6 Luna is $0.20 per million tokens, so GPT-5.6 Luna is cheaper on this metric. GPT-5.4 Mini is $4.50 and GPT-5.6 Luna is $1.20 per million tokens, so GPT-5.6 Luna is cheaper on this metric.
Which has a larger context window, GPT-5.4 Mini or GPT-5.6 Luna?+
GPT-5.6 Luna has the larger sourced context window. GPT-5.4 Mini supports 400,000 tokens and GPT-5.6 Luna supports 1,050,000 tokens.
Which performs better in benchmarks, GPT-5.4 Mini or GPT-5.6 Luna?+
GPT-5.6 Luna leads the current overall benchmark count. The result uses 5 protocol-matched benchmarks from 3 publishers; it is not a universal quality score.
Can GPT-5.4 Mini or GPT-5.6 Luna be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. GPT-5.4 Mini is not marked open weight; GPT-5.6 Luna is not marked open weight.
Can GPT-5.4 Mini and GPT-5.6 Luna understand images?+
GPT-5.4 Mini is documented with image input; GPT-5.6 Luna is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GPT-5.4 Mini or GPT-5.6 Luna?+
Both models have the same sourced maximum output: 128,000 tokens each.
Do GPT-5.4 Mini and GPT-5.6 Luna support reasoning and tool use?+
GPT-5.4 Mini: reasoning, tool calling, and image input. GPT-5.6 Luna: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, GPT-5.4 Mini or GPT-5.6 Luna?+
GPT-5.4 Mini has 2 sourced provider routes; GPT-5.6 Luna has 2, a tie.
Which offers better value, GPT-5.4 Mini or GPT-5.6 Luna?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.