High-volume, cost-sensitive work
Choose DeepSeek V4 Pro
DeepSeek V4 Pro costs 1% less on a typical mix of three input tokens for every output token ($1.98 against $2.00 per million tokens).
DeepSeek V4 Pro vs GPT-6.1 Terra: price, context and capabilities
Choose DeepSeek V4 Pro for high-volume, cost-sensitive work, writing and code generation and reused prompts and documents (RAG, agents). Choose GPT-6.1 Terra for images as input and the latest release.
In short
- DeepSeek V4 Pro is 1% cheaper than GPT-6.1 Terra at the headline price ($1.98 / 1M tokens vs $2.00 / 1M tokens).
- GPT-6.1 Terra reads more per request: 1.05M tokens against 1M.
- GPT-6.1 Terra is the newer model (Oct 26, 2026, against August 2026).
- Only GPT-6.1 Terra offers vision.
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 Pro
DeepSeek V4 Pro charges $3.96 per million output tokens, against $5.00 for GPT-6.1 Terra. Output dominates the bill when answers are long.
Reused prompts and documents (RAG, agents)
Choose DeepSeek V4 Pro
DeepSeek V4 Pro charges $0.04 per million cached input tokens, against $0.05 for GPT-6.1 Terra.
Images as input
Choose GPT-6.1 Terra
GPT-6.1 Terra accepts images as input; DeepSeek V4 Pro does not.
Latest release
Choose GPT-6.1 Terra
GPT-6.1 Terra is the newer release (Oct 26, 2026, against August 2026 for DeepSeek V4 Pro).
Monthly cost at three volumes
| Volume | DeepSeek V4 Pro | GPT-6.1 Terra | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $2.31 | $2.25 | GPT-6.1 Terra, $0.06 less |
| Production: 20M input, 5M output tokens | $46.20 | $45.00 | GPT-6.1 Terra, $1.20 less |
| Scale: 500M input, 100M output tokens | $1,056 | $1,000 | GPT-6.1 Terra, $56.00 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| DeepSeek V4 Pro | GPT-6.1 Terra | |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Generally available |
| Headline price | $1.98 / 1M tokens | $2.00 / 1M tokens |
| Input | $1.32 / 1M tokens | $1.00 / 1M tokens |
| Output | $3.96 / 1M tokens | $5.00 / 1M tokens |
| Cached input | $0.044 / 1M tokens | $0.05 / 1M tokens |
| Context window | 1M | 1.05M |
| Max output | 384k | 128k |
| Released | August 2026 | Oct 26, 2026 |
| Knowledge cutoff | No data | No data |
| Licence | Proprietary | Proprietary |
| Capabilities | Reasoning, Tool calling, Structured output, Prompt caching | Vision, Reasoning, Tool calling, Structured output, Prompt caching |
| API model id | deepseek-v4-pro | gpt-6.1-terra |
Benchmarks side by side
Leader in bold.
| Benchmark | DeepSeek V4 Pro | GPT-6.1 Terra |
|---|---|---|
| Intelligence Index | 36 | No data |
| SciCode | 51% | No data |
| GPQA Diamond | 92.8% | No data |
| Humanity's Last Exam | 41% | No data |
| Long-context reasoning (AA-LCR) | 80.3% | No data |
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 Pro or GPT-6.1 Terra?
Choose DeepSeek V4 Pro for high-volume, cost-sensitive work, writing and code generation and reused prompts and documents (RAG, agents). Choose GPT-6.1 Terra for images as input and the latest release.
Which is cheaper, DeepSeek V4 Pro or GPT-6.1 Terra?
DeepSeek V4 Pro is 1% cheaper than GPT-6.1 Terra at the headline price ($1.98 / 1M tokens vs $2.00 / 1M tokens).
Which has the larger context window, DeepSeek V4 Pro or GPT-6.1 Terra?
GPT-6.1 Terra reads more per request: 1.05M tokens against 1M.
What is the difference between DeepSeek V4 Pro and GPT-6.1 Terra?
DeepSeek V4 Pro is made by DeepSeek and GPT-6.1 Terra by OpenAI. DeepSeek V4 Pro is 1% cheaper than GPT-6.1 Terra at the headline price ($1.98 / 1M tokens vs $2.00 / 1M tokens). GPT-6.1 Terra reads more per request: 1.05M tokens against 1M. GPT-6.1 Terra is the newer model (Oct 26, 2026, against August 2026). Only GPT-6.1 Terra offers vision.
How much do DeepSeek V4 Pro and GPT-6.1 Terra cost per month?
At 20 million input and 5 million output tokens a month, DeepSeek V4 Pro costs $46.20 and GPT-6.1 Terra costs $45.00, at standard rates.
Which is newer, DeepSeek V4 Pro or GPT-6.1 Terra?
GPT-6.1 Terra was released on Oct 26, 2026 and DeepSeek V4 Pro on August 2026.