Gemini 3.8 Flash vs GPT-6.1 Sol: Specs & Benchmark Comparison
Gemini 3.8 Flash is developed by Google, while GPT-6.1 Sol comes from OpenAI. Both were released in September 2026.
The two models share 3 published benchmarks. GPT-6.1 Sol leads on 2 of them, Gemini 3.8 Flash on 1. The widest gaps are on OSWorld 2.0, where GPT-6.1 Sol scores 71.4% against 59.0%; GDP.pdf, where Gemini 3.8 Flash scores 35.0% against 32.0%. Averaged across everything we track, Gemini 3.8 Flash sits at 59.2% and GPT-6.1 Sol at 62.8%.
Gemini 3.8 Flash is the cheaper API at $0.75 per million input tokens and $3.75 per million output tokens, roughly 3 times cheaper than GPT-6.1 Sol at $2 and $10. Both accept a context window of about 1M tokens. Gemini 3.8 Flash accepts text, images, audio, and video as input, while GPT-6.1 Sol accepts text and images.
| Characteristic | Gemini 3.8 Flash | GPT-6.1 Sol |
|---|---|---|
| Company | OpenAI | |
| Release Date | September 2, 2026 | September 29, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 66K | 128K |
| Input Price / 1M | $0.75 | $2.00 |
| Output Price / 1M | $3.75 | $10.00 |
| Average Score | 59.2% | 62.8% |
| Benchmarks | ||
| OSWorld 2.0 | 59.0% | 71.4% |
| GDP.pdf | 35.0% | 32.0% |
| DeepSWE 1.1 | 73.7% | 75.2% |
Visual Benchmark Comparison
Verdict
GPT-6.1 Sol leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Gemini 3.8 Flash — 0.6, GPT-6.1 Sol — 0.6.
Gemini 3.8 Flash is 2.7x cheaper: input $0.75/1M vs $2.00/1M tokens.
GPT-6.1 Sol supports a larger context: 1M vs 1M tokens.
GPT-6.1 Sol is newer: released 9/29/2026 vs 9/2/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Gemini 3.8 Flash or GPT-6.1 Sol?
Which model is cheaper — Gemini 3.8 Flash or GPT-6.1 Sol?
Which has a larger context window — Gemini 3.8 Flash or GPT-6.1 Sol?
The Gemini 3.8 Flash and GPT-6.1 Sol comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Gemini 3.8 Flash or GPT-6.1 Sol page. See also the complete list of AI model comparisons.