▸ compare
OpenAI: GPT-5.5 vs DeepSeek: DeepSeek V4 Flash
Side-by-side benchmark comparison based on independent public data. Scores, pricing, context, and task breakdown.
▸ verdict
OpenAI: GPT-5.5
90.7
higher score
vs
DeepSeek: DeepSeek V4 Flash
80.9
OpenAI: GPT-5.5 leads with a higher composite benchmark score. It's the stronger choice for general-purpose tasks based on public benchmark data.
▸ score breakdown
| Task | OpenAI: GPT-5.5 | DeepSeek: DeepSeek V4 Flash | Δ |
|---|---|---|---|
| Overall | 90.7 | 80.9 | +9.8 |
| Coding | — | — | — |
| Reasoning | 78.4 | — | — |
| Math | — | — | — |
| Writing | 88.8 | — | — |
| JSON | — | — | — |
▸ specs & pricing
| Attribute | OpenAI: GPT-5.5 | DeepSeek: DeepSeek V4 Flash |
|---|---|---|
| Provider | Openai | Deepseek |
| Context window | 1M | 1M |
| Input $/M tokens | $5.00/M | $0.09/M |
| Output $/M tokens | $30.00/M | $0.18/M |
| Weights | proprietary | proprietary |
▸ frequently asked
Is OpenAI: GPT-5.5 better than DeepSeek: DeepSeek V4 Flash?
OpenAI: GPT-5.5 scores higher overall (90.7 vs 80.9) in the benchmark composite. The best choice depends on the specific use case and budget.
Which is cheaper: OpenAI: GPT-5.5 or DeepSeek: DeepSeek V4 Flash?
DeepSeek: DeepSeek V4 Flash is cheaper at $0.09/M input tokens vs $5/M for OpenAI: GPT-5.5.
Which model is better for coding?
Both models perform similarly on coding benchmarks (SWE-Bench, Aider Polyglot, LiveCodeBench).