DeepSeek-V4-Pro-0813 vs GPT-5.6 Terra: Specs & Benchmark Comparison
DeepSeek-V4-Pro-0813 is developed by DeepSeek, while GPT-5.6 Terra comes from OpenAI. GPT-5.6 Terra was released in July 2026, and DeepSeek-V4-Pro-0813 followed a month later in August 2026. DeepSeek-V4-Pro-0813 has a published size of about 1.6 trillion parameters; OpenAI has not disclosed the parameter count of GPT-5.6 Terra.
The two models share 5 published benchmarks. DeepSeek-V4-Pro-0813 leads on 3 of them, GPT-5.6 Terra on 2. The widest gaps are on Agents' Last Exam, where GPT-5.6 Terra scores 50.4% against 25.7%; Toolathlon, where DeepSeek-V4-Pro-0813 scores 74.0% against 53.1%. Averaged across everything we track, DeepSeek-V4-Pro-0813 sits at 60.6% and GPT-5.6 Terra at 59.0%.
DeepSeek-V4-Pro-0813 is the cheaper API at $1.32 per million input tokens and $3.96 per million output tokens, about 52% below GPT-5.6 Terra at $2 and $12. Both accept a context window of about 1M tokens. DeepSeek-V4-Pro-0813 accepts text as input, while GPT-5.6 Terra accepts text and images.
| Characteristic | DeepSeek-V4-Pro-0813 | GPT-5.6 Terra |
|---|---|---|
| Company | DeepSeek | OpenAI |
| Release Date | August 13, 2026 | July 9, 2026 |
| Parameters | 1.6T | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 393K | 128K |
| Input Price / 1M | $1.32 | $2.00 |
| Output Price / 1M | $3.96 | $12.00 |
| Average Score | 60.6% | 59.0% |
| Benchmarks | ||
| Agents' Last Exam | 25.7% | 50.4% |
| Toolathlon | 74.0% | 53.1% |
| AutomationBench | 31.8% | 15.2% |
| DeepSWE | 62.7% | 69.6% |
| Terminal-Bench 2.1 | 88.0% | 87.4% |
Visual Benchmark Comparison
Verdict
DeepSeek-V4-Pro-0813 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: DeepSeek-V4-Pro-0813 — 0.6, GPT-5.6 Terra — 0.6.
DeepSeek-V4-Pro-0813 is 2.7x cheaper: input $1.32/1M vs $2.00/1M tokens.
GPT-5.6 Terra supports a larger context: 1M vs 1M tokens.
DeepSeek-V4-Pro-0813 is newer: released 8/13/2026 vs 7/9/2026.
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Frequently Asked Questions
Which is better for coding — DeepSeek-V4-Pro-0813 or GPT-5.6 Terra?
Which model is cheaper — DeepSeek-V4-Pro-0813 or GPT-5.6 Terra?
Which has a larger context window — DeepSeek-V4-Pro-0813 or GPT-5.6 Terra?
The DeepSeek-V4-Pro-0813 and GPT-5.6 Terra 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-Pro-0813 or GPT-5.6 Terra page. See also the complete list of AI model comparisons.