Home › Compare › OpenAI: GPT-6 Sol Pro vs Pareto 26.9
OpenAI: GPT-6 Sol Pro vs Pareto 26.9: API Pricing Compared
Comparing OpenAI: GPT-6 Sol Pro and Pareto 26.9: on combined input+output list price, Pareto 26.9 is cheaper at $10 vs $12 per 1M tokens — a difference of $2 (17%). OpenAI: GPT-6 Sol Pro costs $2 in / $10 out with a 1,050,000-token context; Pareto 26.9 costs $2.5 in / $7.5 out with a 262,144-token context.
| OpenAI: GPT-6 Sol Pro | Pareto 26.9 | |
|---|---|---|
| Input /1M | $2 | $2.5 |
| Output /1M | $10 | $7.5 |
| Cached input /1M | $0.2 | $0.25 |
| Context window | 1,050,000 | 262,144 |
| Max output tokens | 128,000 | 131,072 |
| Cost @ 10M in + 2M out / mo | $40 | $40 |
Estimate your own workload in the cost calculator, or open the full pages for OpenAI: GPT-6 Sol Pro and Pareto 26.9.
Frequently asked questions
Which is cheaper, OpenAI: GPT-6 Sol Pro or Pareto 26.9?
Pareto 26.9 is cheaper on combined list price: $10 vs $12 per 1M tokens (input + output). At 10M input + 2M output tokens per month, OpenAI: GPT-6 Sol Pro costs $40 and Pareto 26.9 costs $40.
Which has the larger context window, OpenAI: GPT-6 Sol Pro or Pareto 26.9?
OpenAI: GPT-6 Sol Pro has a context window of 1,050,000 tokens; Pareto 26.9 has 262,144 tokens. The larger one is OpenAI: GPT-6 Sol Pro.
Price snapshot October 21, 2026, refreshed daily.