Model comparison
GPT-6.1 Sol vs Mercury 2.5
Neither GPT-6.1 Sol nor Mercury 2.5 has enough public benchmark results to be ranked yet; the rows below show what has been published.
Last verified . 0 shared benchmarks.
Summary
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
- GPT-6.1 Sol accepts more context: 1.05M tokens versus 260K.
Side by side
| GPT-6.1 Sol | Mercury 2.5 | |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 42.1 | 30.2 |
| Released | 2026-09-29 | 2026-09-08 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 260K |
| Max output | 128K | 66K |
| Input $ / M tokens | $2 | $0.04 |
| Output $ / M tokens | $10 | $0.15 |
| Results tracked | 2 | 2 |
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Category by category
Coding Not comparable
GPT-6.1 Sol: 51.4, Mercury 2.5: —
Agentic & Tool Use Not comparable
GPT-6.1 Sol: 34.3, Mercury 2.5: —
| Benchmark | GPT-6.1 Sol | Mercury 2.5 |
|---|---|---|
| GDP.pdf | 32% | — |
Math Not comparable
GPT-6.1 Sol: —, Mercury 2.5: 22.4
| Benchmark | GPT-6.1 Sol | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
Frequently asked questions
Is GPT-6.1 Sol better than Mercury 2.5?
Neither GPT-6.1 Sol nor Mercury 2.5 has enough public benchmark results to be ranked yet; the rows below show what has been published.
Which is cheaper, GPT-6.1 Sol or Mercury 2.5?
Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; GPT-6.1 Sol lists at $2 and $10.
Which has the bigger context window?
GPT-6.1 Sol does, with 1.05M tokens against 260K.
How many benchmarks do GPT-6.1 Sol and Mercury 2.5 share?
0 benchmarks have published results for both models. GPT-6.1 Sol has 2 scored results on Noometry and Mercury 2.5 has 2.