DeepSeek-R1 Instruct vs Grok 3 Reasoning: which model should you choose?
We compared DeepSeek-R1 Instruct and Grok 3 Reasoning on price, context window and 12 benchmarks. DeepSeek-R1 Instruct has the stronger average benchmark score; DeepSeek-R1 Instruct is cheaper on a blended 3:1 basis.
DeepSeek-R1 Instruct
DeepSeek-R1 Instruct is a frontier model from DeepSeek. It offers a 1,000,000-token context window, costs $5.90 per million input tokens and $26.49 per million output tokens, and averages 83.1 across the index's benchmark suite.
- Input
- $5.90 / 1M
- Output
- $26.49 / 1M
- Context
- 1,000,000
- Avg score
- 83.1
- Open weights
- Yes
Grok 3 Reasoning
Grok 3 Reasoning is a frontier model from xAI. It offers a 200,000-token context window, costs $16.07 per million input tokens and $74.65 per million output tokens, and averages 82.9 across the index's benchmark suite.
- Input
- $16.07 / 1M
- Output
- $74.65 / 1M
- Context
- 200,000
- Avg score
- 82.9
- Open weights
- No
Specification comparison
| Spec | DeepSeek-R1 Instruct | Grok 3 Reasoning | Edge |
|---|---|---|---|
| Input price / 1M | $5.90 | $16.07 | A |
| Output price / 1M | $26.49 | $74.65 | A |
| Context window | 1,000,000 | 200,000 | A |
| Max output | 8,192 | 16,384 | B |
| Average score | 83.1 | 82.9 | A |
| Arena Elo | 1447.7 | 1448.0 | B |
| Open weights | Yes | No | A |
Benchmark comparison
DeepSeek-R1 Instruct wins 5, Grok 3 Reasoning wins 7, and 0 benchmarks are tied. The table shows the modelled score for each model and the gap.
| Benchmark | DeepSeek-R1 Instruct | Grok 3 Reasoning | Gap | Winner |
|---|---|---|---|---|
| MMLU-Pro | 84.9 | 84.5 | 0.4 | DeepSeek-R1 Instruct |
| GPQA Diamond | 81.4 | 77.3 | 4.1 | DeepSeek-R1 Instruct |
| SWE-bench Verified | 72.4 | 74.0 | 1.6 | Grok 3 Reasoning |
| HumanEval | 88.0 | 88.5 | 0.5 | Grok 3 Reasoning |
| MATH-500 | 86.2 | 90.2 | 4.0 | Grok 3 Reasoning |
| AIME 2025 | 77.6 | 78.2 | 0.6 | Grok 3 Reasoning |
| LiveCodeBench | 79.6 | 76.5 | 3.1 | DeepSeek-R1 Instruct |
| IFEval | 88.9 | 90.2 | 1.3 | Grok 3 Reasoning |
| TruthfulQA | 82.2 | 83.4 | 1.2 | Grok 3 Reasoning |
| HellaSwag | 91.1 | 89.7 | 1.4 | DeepSeek-R1 Instruct |
| MMMU | 81.5 | 79.4 | 2.1 | DeepSeek-R1 Instruct |
| Arena Elo | 1447.7 | 1448.0 | 0.3 | Grok 3 Reasoning |
Price analysis
On a blended 3:1 input-to-output basis, DeepSeek-R1 Instruct costs about $11.05 per million tokens and Grok 3 Reasoning costs about $30.72. DeepSeek-R1 Instruct is roughly 64% cheaper than Grok 3 Reasoning. At high volume, that gap compounds quickly, so price should carry real weight unless the quality difference is decisive.
DeepSeek-R1 Instruct has the larger context window at 1,000,000 tokens, compared with 200,000 for Grok 3 Reasoning. That matters for long documents, large codebases and multi-step agent traces.
Verdict
Across 12 shared benchmarks, DeepSeek-R1 Instruct wins 5, Grok 3 Reasoning wins 7, and 0 are tied. On the index average, DeepSeek-R1 Instruct leads Grok 3 Reasoning by 0.2 points (83.1 versus 82.9).
The price picture favours DeepSeek-R1 Instruct. The context picture favours DeepSeek-R1 Instruct. Those two dimensions often matter more than a few benchmark points once a model is good enough for the task.
If you need a single default, start with DeepSeek-R1 Instruct for quality-sensitive work, and check whether its price holds at your expected volume before committing.
Choose DeepSeek-R1 Instruct if
- You want the higher average benchmark score in this index.
- Unit cost matters and you want the cheaper blended price.
- You need the larger 1,000,000-token context window.
- You need open weights for self-hosting or fine-tuning.
Choose Grok 3 Reasoning if
- You need the larger 16,384-token output limit.
FAQ
Is DeepSeek-R1 Instruct better than Grok 3 Reasoning?
On the index average, DeepSeek-R1 Instruct leads Grok 3 Reasoning by 0.2 points (83.1 versus 82.9). The better choice depends on price, context and your task. DeepSeek-R1 Instruct wins 5 benchmarks, Grok 3 Reasoning wins 7.
Which is cheaper, DeepSeek-R1 Instruct or Grok 3 Reasoning?
DeepSeek-R1 Instruct is cheaper on a blended 3:1 basis at about $11.05 per million tokens, versus $30.72 for Grok 3 Reasoning.
Which has the larger context window?
DeepSeek-R1 Instruct has the larger context window at 1,000,000 tokens. Grok 3 Reasoning has 200,000 tokens.
Are these models open weights?
DeepSeek-R1 Instruct is open weights; Grok 3 Reasoning is proprietary.
Which should I choose for production?
If you need a single default, start with DeepSeek-R1 Instruct for quality-sensitive work, and check whether its price holds at your expected volume before committing.