Gemini 3.5 Flash-Lite vs GPT-5.6 Luna
Benchmark Performance
Available Benchmarks
| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.6 Luna |
|---|---|---|
| ARC-AGI-1verified-v1-b2e2a31b3d53 · verified_score · leader | 53.5059% of row best · percent · Gemini 3.5 Flash-Lite (High) | 90.67100% of row best · percent · GPT-5.6 Luna 2026-07-30 (Max) |
| ARC-AGI-2verified-v2-326661568d5f · verified_score · leader | 10.2817% of row best · percent · Gemini 3.5 Flash-Lite (High) | 59.58100% of row best · percent · GPT-5.6 Luna 2026-07-30 (Max) |
| LMArena Agent Arenaagent-2026-08-31-011508720696 · outcome_score · leader | -10.8187% of row best · score · Gemini 3.5 Flash Lite; 95% CI [-12.19929495, -9.42408695]; sessions 22348; observations 634592; rank 51 | 2.13100% of row best · score · GPT 5.6 Luna (xHigh); 95% CI [0.89962762, 3.35915348]; sessions 16383; observations 1269520; rank 26 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · statistical tie | 1,436.25100% of row best · rating · gemini-3.5-flash-lite; 95% CI [1431.05053629, 1441.44358777]; votes 21843; rank 74 | 1,430.14100% of row best · rating · gpt-5.6-luna-xhigh; 95% CI [1425.14784950, 1435.13857729]; votes 24433; rank 82 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · statistical tie | 1,268.89100% of row best · rating · gemini-3.5-flash-lite; 95% CI [1258.10808094, 1279.66830878]; votes 3886; rank 34 | 1,254.3099% of row best · rating · gpt-5.6-luna-xhigh; 95% CI [1245.05722338, 1263.53552757]; votes 5857; rank 45 |
| LiveBench2026-06-25 · overall · leader | 66.3586% of row best · percent · gemini-3.5-flash-lite-high · 11,526 output tokens / case | 77.05100% of row best · percent · gpt-5.6-luna-max · 21,799 output tokens / case |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 73.4290% of row best · points · Gemini 3.5 Flash-Lite · 1,966 output tokens / case | 81.47100% of row best · points · GPT-5.6 Luna (default) · 3,295 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 2 ties | 0 benchmark wins | 5 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.
Technical Differences
Side-by-Side Facts
| Field | Gemini 3.5 Flash-Lite | GPT-5.6 Luna |
|---|---|---|
| Developer | Google DeepMind | OpenAI |
| Family | Gemini 3 | Gpt 5 6 |
| Model | Gemini 3.5 Flash-Lite | GPT-5.6 Luna |
| Version | Gemini 3.5 Flash-Lite | GPT-5.6 Luna |
| Lifecycle | active | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | Unknown | 2026-02-16 |
| Input modalities | Text, Image, Video, Audio, Document | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,048,576 | 1,050,000 |
| 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 | Google AI (Standard), Google Gemini (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
13 comparable fields · 7 material differences · Pair passes the primary-source comparison gate
Gemini 3.5 Flash-Lite Capabilities
GPT-5.6 Luna Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
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GPT-5.4 ProOpenAI | vs | GPT-5.6 LunaOpenAI | family variantsimage, text |
GPT-5.4 MiniOpenAI | vs | GPT-5.6 LunaOpenAI | family variantsimage, text |
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Claude Fable 5Anthropic | vs | GPT-5.6 LunaOpenAI | cross-developer peersimage, text |
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Seed 2.0 LiteByteDance Seed | vs | Gemini 3.5 Flash-LiteGoogle DeepMind | cross-developer peerstext |
| vs | GPT-5.6 LunaOpenAI | cross-developer peersimage, text | |
Gemini 3.5 Flash-LiteGoogle DeepMind | vs |  Qwen3 VL FlashQwen | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
Gemini 3.5 Flash-Lite vs GPT-5.6 Luna FAQs
Is Gemini 3.5 Flash-Lite or GPT-5.6 Luna better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 3.5 Flash-Lite and GPT-5.6 Luna, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 3.5 Flash-Lite or GPT-5.6 Luna?+
Gemini 3.5 Flash-Lite is $0.30 and GPT-5.6 Luna is $0.20 per million tokens, so GPT-5.6 Luna is cheaper on this metric. Gemini 3.5 Flash-Lite is $2.50 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, Gemini 3.5 Flash-Lite or GPT-5.6 Luna?+
GPT-5.6 Luna has the larger sourced context window. Gemini 3.5 Flash-Lite supports 1,048,576 and GPT-5.6 Luna supports 1,050,000.
Which performs better in benchmarks, Gemini 3.5 Flash-Lite or GPT-5.6 Luna?+
GPT-5.6 Luna leads the current overall benchmark count. The result uses 7 protocol-matched benchmarks from 4 publishers; it is not a universal quality score.
Can Gemini 3.5 Flash-Lite or GPT-5.6 Luna be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Gemini 3.5 Flash-Lite is not marked open weight; GPT-5.6 Luna is not marked open weight.
Can Gemini 3.5 Flash-Lite and GPT-5.6 Luna understand images?+
Gemini 3.5 Flash-Lite 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, Gemini 3.5 Flash-Lite or GPT-5.6 Luna?+
GPT-5.6 Luna has the larger sourced maximum output: Gemini 3.5 Flash-Lite supports 65,536 and GPT-5.6 Luna supports 128,000 output tokens.
Do Gemini 3.5 Flash-Lite and GPT-5.6 Luna support reasoning and tool use?+
Gemini 3.5 Flash-Lite: 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, Gemini 3.5 Flash-Lite or GPT-5.6 Luna?+
Gemini 3.5 Flash-Lite has 2 sourced provider routes; GPT-5.6 Luna has 2, a tie.
Which offers better value, Gemini 3.5 Flash-Lite 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.