OpenAI: GPT-5.3-Codex vs OpenAI: GPT-5.6 Sol Pro
OpenAI: GPT-5.6 Sol Pro is cheaper on output tokens, while OpenAI: GPT-5.6 Sol Pro offers a larger context window. Choose OpenAI: GPT-5.3-Codex or OpenAI: GPT-5.6 Sol Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | OpenAI: GPT-5.3-Codex | OpenAI: GPT-5.6 Sol Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $1.75 | $2.00 |
| Output / 1M tokens | $14.00 | $10.00 |
| Context window | 400K | 1.1M |
| Parameters | — | — |
| Open weights | No | — |
| Released | Feb 2026 | — |
FAQ
Is OpenAI: GPT-5.3-Codex or OpenAI: GPT-5.6 Sol Pro cheaper?
OpenAI: GPT-5.6 Sol Pro is cheaper on output tokens ($10.00 vs $14.00 per 1M).
Which has the larger context window, OpenAI: GPT-5.3-Codex or OpenAI: GPT-5.6 Sol Pro?
OpenAI: GPT-5.6 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.