GPT-4 Turbo vs Chat Latest (GPT-5.5 Instant)
Both have similar output pricing, while Chat Latest (GPT-5.5 Instant) offers a larger context window. Choose GPT-4 Turbo or Chat Latest (GPT-5.5 Instant) based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-4 Turbo | Chat Latest (GPT-5.5 Instant) |
|---|---|---|
| Provider | OpenAI | ZenMux |
| Input / 1M tokens | $10.00 | $5.00 |
| Output / 1M tokens | $30.00 | $30.00 |
| Context window | 128K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Nov 2023 | May 2026 |
| GPQA Diamond score | 46.6 | — |
| LMArena (Chatbot Arena) Elo score | 1272 | — |
| LMArena Vision Elo score | 1090 | — |
| Epoch Capabilities Index score | 127 | — |
FAQ
Is GPT-4 Turbo or Chat Latest (GPT-5.5 Instant) cheaper?
GPT-4 Turbo and Chat Latest (GPT-5.5 Instant) have comparable output pricing.
Which has the larger context window, GPT-4 Turbo or Chat Latest (GPT-5.5 Instant)?
Chat Latest (GPT-5.5 Instant) has the larger context window (400K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.