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GPT-6.1 Sol vs GPT-6 Astra
GPT-6 Astra scores higher than GPT-6.1 Sol on all 6 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-6.1 Sol is at 88.2 and GPT-6 Astra at 91.2 (out of 100).
Scores as published by each board; table composed October 8, 2026.
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Leaderboard by leaderboard
| Board | GPT-6.1 Sol | GPT-6 Astra | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,755.4 | 1,786.1 | GPT-6 Astra |
| LiveBench global average (0-100) | 81.6 | 82.2 | GPT-6 Astra |
| SimpleBench AVG@5 % (private set) | 82.9 | 86.5 | GPT-6 Astra |
| LLM Stats LLM Stats Score · composite (0-100), their rendered top 15 | 53.9 | 58.3 | GPT-6 Astra |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 61.2 | 63.1 | GPT-6 Astra |
| Artificial Analysis intelligence index · measured runs only | 51.8 | 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.
For coding
On the ArtificialWatch coding index, GPT-6.1 Sol is at 82.4 (#6 of 35) and GPT-6 Astra at 85.3 (#5). GPT-6.1 Sol scores higher on 1 of the 3 coding boards that rate both and GPT-6 Astra on 2.
| Coding board | GPT-6.1 Sol | GPT-6 Astra |
|---|---|---|
| LMArena · Coding | 1,545.3 | 1,541.6 |
| LiveBench · Coding | 68.8 | 68.8 |
| Vals Vibe Code Bench | 88.9 | 89.6 |
GPT-6.1 Sol at a glance
- Developer
- OpenAI
- Status
- Live since September 29, 2026
- API price
- $2 input / $10 output per 1M tokens · OpenAI, gpt-6.1-sol
- Context window
- 1.05M tokens
Live — Sep 29, launched at DevDay · Ultrafast tier open to all API users Oct 8 at $12/$60 (six times standard, OpenAI's pricing page) · $2/$10 per 1M, cached input $0.10 (half of GPT-6 Sol's) · in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu, not yet in Chat · OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at a fifth of Astra's price · Artificial Analysis Intelligence Index 52 at max effort, #10 of 221 reasoning models (read Sep 29) · 1.05M ctx as OpenRouter lists it, which also carries gpt-6.1-sol-pro (the same model in a pro reasoning mode) · Ultrafast (up to 8x faster in Codex) 'in the coming days' · our sweep read gpt-6.1-sol on OpenAI's public model docs at 17:23 UTC and fired at 17:24, about 20 minutes after the keynote.
GPT-6.1 Sol Ultrafast opens to every API user at $12 / $60, six times standard Sol
2026-10-08 · OpenAI's Ultrafast tier now covers GPT-6.1 Sol for every API user. OpenAI's API docs, read on October 8, say Ultrafast mode is "broadly available" for GPT-6 Astra and GPT-6.1 Sol and "available to all API users", with preview access for GPT-5.6 Sol.
GPT-6.1 Sol ships at DevDay at $2/$10, and OpenAI says it nearly matches Astra
2026-09-29 · OpenAI launched GPT-6.1 Sol at its DevDay keynote on September 29. It is available now in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users, not yet in Chat, and in the API as gpt-6.1-sol.
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) · DevDay Sep 29: an Ultrafast tier (up to 8x faster, ~300 tokens/s in Codex) is in the API and, in ChatGPT Work and Codex, on Pro 500 and Enterprise.
GPT-6 Astra and GPT-6.1 Sol now run about 50% faster on ChatGPT subscriptions
2026-10-05 · GPT-6 Astra and GPT-6.1 Sol now run about 50% faster by default for ChatGPT subscribers, OpenAI's Tibo Sottiaux said today. He puts it at about 50 tokens per second, up from 30.
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.
GPT-6.1 Sol vs GPT-6 Astra: quick answers
Which is better, GPT-6.1 Sol or GPT-6 Astra?
It depends on what you measure. GPT-6 Astra scores higher than GPT-6.1 Sol on all 6 public leaderboards that rate both. GPT-6 Astra's widest lead is on LLM Stats. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GPT-6.1 Sol is at 88.2 and GPT-6 Astra at 91.2 (out of 100).
Which is newer, GPT-6.1 Sol or GPT-6 Astra?
GPT-6.1 Sol. It went live on September 29, 2026, 26 days after GPT-6 Astra (September 3, 2026).
Which is cheaper, GPT-6.1 Sol or GPT-6 Astra?
GPT-6.1 Sol is cheaper on both input and output. On each vendor's own API, GPT-6.1 Sol is $2 input / $10 output per million tokens and GPT-6 Astra is $10 input / $50 output per million tokens. GPT-6.1 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 2026-10-08.
Which has the bigger context window, GPT-6.1 Sol or GPT-6 Astra?
Neither. Both take 1.05M tokens.
How do GPT-6.1 Sol and GPT-6 Astra compare for coding?
On the ArtificialWatch coding index, GPT-6.1 Sol is at 82.4 (#6 of 35) and GPT-6 Astra at 85.3 (#5). GPT-6.1 Sol scores higher on 1 of the 3 coding boards that rate both and GPT-6 Astra on 2.
Who makes GPT-6.1 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 October 8, 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