o3-deep-research vs GPT-5.3 Chat
GPT-5.3 Chat is cheaper on output tokens, while o3-deep-research offers a larger context window. Choose o3-deep-research or GPT-5.3 Chat based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | o3-deep-research | GPT-5.3 Chat |
|---|---|---|
| Provider | Vercel AI Gateway | Vercel AI Gateway |
| Input / 1M tokens | $10.00 | $1.75 |
| Output / 1M tokens | $40.00 | $14.00 |
| Context window | 200K | 128K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Jun 2025 | Mar 2026 |
FAQ
Is o3-deep-research or GPT-5.3 Chat cheaper?
GPT-5.3 Chat is cheaper on output tokens ($14.00 vs $40.00 per 1M).
Which has the larger context window, o3-deep-research or GPT-5.3 Chat?
o3-deep-research has the larger context window (200K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.