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GPT-6 Sol vs GPT-6 Astra
GPT-6 Astra scores higher than GPT-6 Sol on all 5 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 Astra at 91.5 (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 Astra | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,685.9 | 1,792.2 | GPT-6 Astra |
| LiveBench global average (0-100) | 79.2 | 82.2 | GPT-6 Astra |
| SimpleBench AVG@5 % (private set) | 73.1 | 86.5 | GPT-6 Astra |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 62.6 | 66.6 | GPT-6 Astra |
| Artificial Analysis intelligence index · measured runs only | 47.5 | 52.7 | GPT-6 Astra |
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 Astra at a glance
- Developer
- OpenAI
- Status
- Live since September 3, 2026
- API price
- $10 input / $50 output per 1M tokens · OpenAI, gpt-6-astra
- Context window
- 1.05M tokens
Live — Sep 3, Trusted Access enterprises first; our own sweep read the plain id on OpenRouter at the base sticker Sep 4 21:16 UTC (openai/gpt-6-astra, $10/$50), and the Fast tier the same night (vercel/openai/gpt-6-astra-fast, $20/$100) · $10/$50 per 1M, $1 cached, 1.05M ctx / 128K out · AA Coding Agent Index 67 (≈ Opus 5, Fable 5), Intelligence Index 61 (= GPT-5.6 Sol, 5 below Fable 5.1).
GPT-6 Astra is out — Fable 5.1's sticker, trusted access first, public API within days
2026-09-03 · OpenAI shipped GPT-6 Astra today. Its own words, from the model documentation: "Our most capable model, built for the hardest end-to-end work" — complex reasoning, coding, computer use, research and document creation.
OpenAI is treating Astra as its first Critical cyber model — and slowing it down, 24 hours after the leaks said next week
2026-08-07 · Twenty-four hours ago both accounts we track said Astra was launching next week. Today OpenAI published that it is slowing the model down, and the reason outranks any launch calendar.
GPT-6 Sol vs GPT-6 Astra: quick answers
Which is better, GPT-6 Sol or GPT-6 Astra?
It depends on what you measure. GPT-6 Astra scores higher than GPT-6 Sol on all 5 public leaderboards that rate both. GPT-6 Astra's widest lead is on SimpleBench. 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 Astra at 91.5 (out of 100).
Which is newer, GPT-6 Sol or GPT-6 Astra?
GPT-6 Sol. It went live on September 22, 2026, 19 days after GPT-6 Astra (September 3, 2026).
Which is cheaper, GPT-6 Sol or GPT-6 Astra?
GPT-6 Sol 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 Astra is $10 input / $50 output per million tokens. GPT-6 Sol's rate rises for prompts over 272K tokens; GPT-6 Astra'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 Astra?
Neither. Both take 1.05M tokens.
Who makes GPT-6 Sol and GPT-6 Astra?
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