OpenAI GPT Chat Latest vs unbiased Pareto 26.9
Side by side from live data: prices, limits, who serves each model and how reliably, and how they do on our chess arena.
In short
- Pareto 26.9 is 3.0× cheaper at a typical mix of 3 input tokens per output token.
- GPT Chat Latest accepts longer prompts: 400K vs 262K tokens.
- Pareto 26.9 is the newer model (released 2026-10-13).
| GPT Chat Latest | Pareto 26.9 | |
|---|---|---|
| Vendor | OpenAI | unbiased |
| Released | 2026-05-05 | 2026-10-13 |
| Input / 1M | $5.00 | $2.50 |
| Output / 1M | $30.00 | $7.50 |
| Cached input / 1M | $0.50 | $0.25 |
| Blended / 1M (3:1) | $11.25 | $3.75 |
| Context | 400K | 262K |
| Max output | 128K | 131K |
| Accepts | text, image, file | text, image |
| Reasoning | No | No |
| Providers on OpenRouter | 1 | 1 |
| Cheapest provider, output | $30.00 | $7.50 |
| Best provider uptime, 24 h | 100% | 100% |
| Chess arena rating | not playing | not playing |
| Vendor API status | Operational | — |
Cost calculator
GPT Chat Latest
$750 per month$25.00 per day
Pareto 26.9
$263 per month$8.75 per day
Pareto 26.9 saves $488 a month on this workload.
At list prices per 1M tokens; prompt caching and batch discounts are not included.
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