GPT-6.1 Sol vs GPT-6 Astra vs GPT-6 Sol
Pick two to four models to compare benchmark scores, prices, context windows and speed. The link updates as you pick, so you can share the exact comparison.
Cheapest blended
GPT-6.1 SolGPT-6 Sol
Tie at $4.00 / 1M tokens
Largest context
GPT-6.1 SolGPT-6 AstraGPT-6 Sol
Tie at 1.05M tokens
Fastest output
GPT-6 Sol
92 tokens/s
Top on DeepSWE v1.1
GPT-6.1 Sol
75.2%
Specifications
| Spec | GPT-6.1 SolOpenAI | GPT-6 AstraOpenAI | GPT-6 SolOpenAI |
|---|---|---|---|
| Provider | OpenAI | OpenAI | OpenAI |
| Released | 29 Sep 2026 | 3 Sep 2026 | 22 Sep 2026 |
| Licence | Proprietary | Proprietary | Proprietary |
| Context window | 1.05M tokens | 1.05M tokens | 1.05M tokens |
| Max output | 128K tokens | 128K tokens | 128K tokens |
| Input / 1M | $2.00* | $10.00* | $2.00* |
| Output / 1M | $10.00 | $50.00 | $10.00 |
| Cached input / 1M | $0.10 | $1.00 | $0.20 |
| Speed | 64 tokens/s | 51 tokens/s | 92 tokens/s |
| Input types | text, image | text, image | text, image |
| Best for | CodingAgentsReasoning | CodingAgentsReasoningResearch | CodingAgents |
* GPT-6.1 Sol: Cache reads are 0.05x input (95% off), not the usual 0.1x. Cache writes 1.25x input. Batch and Flex: $1 / $5. Fast mode: $4 / $20. OpenAI says an Ultrafast option is coming 'in the coming days'; it is not on the pricing page yet. Data residency +10%.
* GPT-6 Astra: Cache writes are 1.25x input; cache reads 0.1x; 30-minute minimum cache life. Batch and Flex: $5 in / $25 out. Fast mode (formerly Priority): 2x, $20 / $100. Ultrafast (Responses API, service_tier "ultrafast", Astra only): $60 in / $6 cached / $75 cache write / $300 out. Data residency endpoints +10%.
* GPT-6 Sol: Superseded by GPT-6.1 Sol, which costs the same but has cheaper cached input ($0.10). Batch and Flex: $1 / $5. Fast mode: $4 / $20. Cache writes 1.25x input; 30-minute minimum cache life. Data residency +10%. Launched at 50% below GPT-5.6 Sol's promotional price.
Benchmark scores
Officially reported scores only. A model with no published score on a benchmark shows a line, not a zero.
Price per 1M tokens
Context window and speed
Notes
- GPT-6.1 Sol
- An upgrade to GPT-6 Sol that OpenAI says nearly matches GPT-6 Astra on agentic coding, computer use and professional work at one-fifth of Astra's standard token prices.
- GPT-6 Astra
- OpenAI's most capable model, for the hardest end-to-end work: complex reasoning, coding, computer use, research and document creation.
- GPT-6 Sol
- Built for complex coding and agentic workflows. OpenAI's docs now point to GPT-6.1 Sol as the newer Sol model.
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