OpenAI: GPT-5.1-Codex vs OpenAI: GPT-6.1 Sol Pro
Both have similar output pricing, while OpenAI: GPT-6.1 Sol Pro offers a larger context window. Choose OpenAI: GPT-5.1-Codex or OpenAI: GPT-6.1 Sol Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | OpenAI: GPT-5.1-Codex | OpenAI: GPT-6.1 Sol Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $1.25 | $2.00 |
| Output / 1M tokens | $10.00 | $10.00 |
| Context window | 400K | 1.1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Nov 2025 | — |
FAQ
Is OpenAI: GPT-5.1-Codex or OpenAI: GPT-6.1 Sol Pro cheaper?
OpenAI: GPT-5.1-Codex and OpenAI: GPT-6.1 Sol Pro have comparable output pricing.
Which has the larger context window, OpenAI: GPT-5.1-Codex or OpenAI: GPT-6.1 Sol Pro?
OpenAI: GPT-6.1 Sol Pro has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.