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GPT-6 Sol vs GPT-6 Luna
GPT-6 Sol scores higher than GPT-6 Luna on all 4 public leaderboards that rate both. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GPT-6 Sol is at 75.9 and GPT-6 Luna at 40.9 (out of 100).
Scores as published by each board; table composed September 25, 2026.
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Leaderboard by leaderboard
| Board | GPT-6 Sol | GPT-6 Luna | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,685.9 | 1,593.2 | GPT-6 Sol |
| LiveBench global average (0-100) | 79.2 | 72 | GPT-6 Sol |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 62.6 | 58.5 | GPT-6 Sol |
| Artificial Analysis intelligence index · measured runs only | 47.5 | 37.3 | GPT-6 Sol |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
GPT-6 Sol at a glance
- Developer
- OpenAI
- Status
- Live since September 22, 2026
- API price
- $2 input / $10 output per 1M tokens · OpenAI, gpt-6-sol
- Context window
- 1.05M tokens
Live — Sep 22, in the API, ChatGPT and Codex the same day · the everyday tier under Astra · models.dev lists gpt-6-sol on OpenAI's own API (read Sep 24).
GPT-6 Luna at a glance
- Developer
- OpenAI
- Status
- Live since September 22, 2026
- API price
- $0.10 input / $0.50 output per 1M tokens · OpenAI, gpt-6-luna
- Context window
- 1.05M tokens
Live — Sep 22, in the API and ChatGPT (Free and Go too) the same day · the cheap, high-volume tier · models.dev lists gpt-6-luna on OpenAI's own API (read Sep 24).
GPT-6 Sol vs GPT-6 Luna: quick answers
Which is better, GPT-6 Sol or GPT-6 Luna?
It depends on what you measure. GPT-6 Sol scores higher than GPT-6 Luna on all 4 public leaderboards that rate both. GPT-6 Sol's widest lead is on LiveBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GPT-6 Sol is at 75.9 and GPT-6 Luna at 40.9 (out of 100).
Which is cheaper, GPT-6 Sol or GPT-6 Luna?
GPT-6 Luna is cheaper on both input and output. On each vendor's own API, GPT-6 Sol is $2 input / $10 output per million tokens and GPT-6 Luna is $0.10 input / $0.50 output per million tokens. GPT-6 Sol's rate rises for prompts over 272K tokens; GPT-6 Luna's rate rises for prompts over 272K tokens. Prices as published in the models.dev catalog, as of 2026-09-25.
Which has the bigger context window, GPT-6 Sol or GPT-6 Luna?
Neither. Both take 1.05M tokens.
Who makes GPT-6 Sol and GPT-6 Luna?
Both are from OpenAI.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed September 25, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · the wire