High-volume, cost-sensitive work
Choose DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 costs 43% less on a typical mix of three input tokens for every output token ($0.15 against $0.26 per million tokens).
DeepSeek V4 Flash 0731 vs GPT-4o Mini: price, context and capabilities
Choose DeepSeek V4 Flash 0731 for high-volume, cost-sensitive work, writing and code generation, reused prompts and documents (RAG, agents), very long inputs and the latest release. Choose GPT-4o Mini for images as input.
In short
- DeepSeek V4 Flash 0731 is 43% cheaper than GPT-4o Mini at the headline price ($0.1488 / 1M tokens vs $0.2625 / 1M tokens).
- DeepSeek V4 Flash 0731 reads more per request: 1.05M tokens against 128k.
- DeepSeek V4 Flash 0731 is the newer model (Jul 31, 2026, against Jul 18, 2024).
- Only DeepSeek V4 Flash 0731 offers reasoning.
- Only GPT-4o Mini offers vision, batch api.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Writing and code generation
Choose DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 charges $0.24 per million output tokens, against $0.60 for GPT-4o Mini. Output dominates the bill when answers are long.
Reused prompts and documents (RAG, agents)
Choose DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 charges $0.02 per million cached input tokens, against $0.08 for GPT-4o Mini.
Very long inputs
Choose DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 reads up to 1.05M tokens per request, against 128k for GPT-4o Mini.
Images as input
Choose GPT-4o Mini
GPT-4o Mini accepts images as input; DeepSeek V4 Flash 0731 does not.
Latest release
Choose DeepSeek V4 Flash 0731
DeepSeek V4 Flash 0731 is the newer release (Jul 31, 2026, against Jul 18, 2024 for GPT-4o Mini).
Monthly cost at three volumes
| Volume | DeepSeek V4 Flash 0731 | GPT-4o Mini | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $0.18 | $0.30 | DeepSeek V4 Flash 0731, $0.12 less |
| Production: 20M input, 5M output tokens | $3.57 | $6.00 | DeepSeek V4 Flash 0731, $2.43 less |
| Scale: 500M input, 100M output tokens | $83.30 | $135.00 | DeepSeek V4 Flash 0731, $51.70 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| DeepSeek V4 Flash 0731 | GPT-4o Mini | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Deprecated |
| Headline price | $0.1488 / 1M tokens | $0.2625 / 1M tokens |
| Input | $0.119 / 1M tokens | $0.15 / 1M tokens |
| Output | $0.238 / 1M tokens | $0.60 / 1M tokens |
| Cached input | $0.0238 / 1M tokens | $0.075 / 1M tokens |
| Context window | 1.05M | 128k |
| Max output | 944k | 16k |
| Released | Jul 31, 2026 | Jul 18, 2024 |
| Knowledge cutoff | No data | October 2023 |
| Licence | Proprietary | Proprietary |
| Capabilities | Reasoning, Tool calling, Structured output, Prompt caching | Vision, Tool calling, Structured output, Prompt caching, Batch API |
| API model id | deepseek-v4-flash-0731 | gpt-4o-mini |
Benchmarks side by side
Leader in bold.
| Benchmark | DeepSeek V4 Flash 0731 | GPT-4o Mini |
|---|---|---|
| GPQA Diamond | No data | 42.6% |
| Humanity's Last Exam | No data | 4.2% |
| IFBench (instruction following) | No data | 31% |
| MMMU-Pro (visual reasoning) | No data | 41.5% |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose DeepSeek V4 Flash 0731 or GPT-4o Mini?
Choose DeepSeek V4 Flash 0731 for high-volume, cost-sensitive work, writing and code generation, reused prompts and documents (RAG, agents), very long inputs and the latest release. Choose GPT-4o Mini for images as input.
Which is cheaper, DeepSeek V4 Flash 0731 or GPT-4o Mini?
DeepSeek V4 Flash 0731 is 43% cheaper than GPT-4o Mini at the headline price ($0.1488 / 1M tokens vs $0.2625 / 1M tokens).
Which has the larger context window, DeepSeek V4 Flash 0731 or GPT-4o Mini?
DeepSeek V4 Flash 0731 reads more per request: 1.05M tokens against 128k.
What is the difference between DeepSeek V4 Flash 0731 and GPT-4o Mini?
DeepSeek V4 Flash 0731 is made by DeepSeek and GPT-4o Mini by OpenAI. DeepSeek V4 Flash 0731 is 43% cheaper than GPT-4o Mini at the headline price ($0.1488 / 1M tokens vs $0.2625 / 1M tokens). DeepSeek V4 Flash 0731 reads more per request: 1.05M tokens against 128k. DeepSeek V4 Flash 0731 is the newer model (Jul 31, 2026, against Jul 18, 2024). Only DeepSeek V4 Flash 0731 offers reasoning. Only GPT-4o Mini offers vision, batch api.
How much do DeepSeek V4 Flash 0731 and GPT-4o Mini cost per month?
At 20 million input and 5 million output tokens a month, DeepSeek V4 Flash 0731 costs $3.57 and GPT-4o Mini costs $6.00, at standard rates.
Which is newer, DeepSeek V4 Flash 0731 or GPT-4o Mini?
DeepSeek V4 Flash 0731 was released on Jul 31, 2026 and GPT-4o Mini on Jul 18, 2024.