DeepSeek-V4-Flash-0731 vs GPT-6.1 Sol: Specs & Benchmark Comparison
DeepSeek-V4-Flash-0731 is developed by DeepSeek, while GPT-6.1 Sol comes from OpenAI. DeepSeek-V4-Flash-0731 was released in July 2026, and GPT-6.1 Sol followed 2 months later in September 2026. DeepSeek-V4-Flash-0731 has a published size of about 304 billion parameters; OpenAI has not disclosed the parameter count of GPT-6.1 Sol.
We have 9 benchmark results for DeepSeek-V4-Flash-0731 and 10 benchmark results for GPT-6.1 Sol, but they were measured on different benchmarks, so there is no like-for-like scoreboard.
DeepSeek-V4-Flash-0731 is the cheaper API at $0.14 per million input tokens and $0.28 per million output tokens, roughly 14 times cheaper than GPT-6.1 Sol at $2 and $10. Both accept a context window of about 1M tokens. DeepSeek-V4-Flash-0731 accepts text as input, while GPT-6.1 Sol accepts text and images.
| Characteristic | DeepSeek-V4-Flash-0731 | GPT-6.1 Sol |
|---|---|---|
| Company | DeepSeek | OpenAI |
| Release Date | July 31, 2026 | September 29, 2026 |
| Parameters | 304B | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 393K | 128K |
| Input Price / 1M | $0.14 | $2.00 |
| Output Price / 1M | $0.28 | $10.00 |
| Average Score | 57.5% | 58.5% |
Verdict
GPT-6.1 Sol leads in 2 out of 4 comparison categories.
Both models show comparable average scores: DeepSeek-V4-Flash-0731 — 0.6, GPT-6.1 Sol — 0.6.
DeepSeek-V4-Flash-0731 is 28.6x cheaper: input $0.14/1M 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 7/31/2026.
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Frequently Asked Questions
Which is better for coding — DeepSeek-V4-Flash-0731 or GPT-6.1 Sol?
Which model is cheaper — DeepSeek-V4-Flash-0731 or GPT-6.1 Sol?
Which has a larger context window — DeepSeek-V4-Flash-0731 or GPT-6.1 Sol?
The DeepSeek-V4-Flash-0731 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 DeepSeek-V4-Flash-0731 or GPT-6.1 Sol page. See also the complete list of AI model comparisons.