Grok 3 Pro: pricing, context window and benchmarks
Grok 3 Pro is a frontier model from xAI. It offers a 400,000-token context window, costs $16.61 per million input tokens and $73.49 per million output tokens, and averages 83.8 across the index's benchmark suite.
Pricing
Grok 3 Pro costs $16.61 per million input tokens and $73.49 per million output tokens. A blended 3:1 input-to-output mix works out to about $30.83 per million tokens. Cached input is listed at $2.26 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $16.61 | per 1M tokens |
| Output | $73.49 | per 1M tokens |
| Cached input | $2.26 | per 1M tokens |
| Blended 3:1 | $30.83 | estimate per 1M tokens |
| 1M in + 1M out | $90.10 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 83.5 | 95 | 84th | |
| GPQA Diamond | 81.3 | 41 | 93th | |
| SWE-bench Verified | 71.4 | 87 | 86th | |
| HumanEval | 89.9 | 48 | 92th | |
| MATH-500 | 87.0 | 77 | 87th | |
| AIME 2025 | 85.5 | 31 | 95th | |
| LiveCodeBench | 80.7 | 34 | 94th | |
| IFEval | 88.6 | 93 | 85th | |
| TruthfulQA | 84.6 | 71 | 88th | |
| HellaSwag | 90.7 | 70 | 88th | |
| MMMU | 78.9 | 75 | 88th | |
| Arena Elo | 1448.4 | 78 | 87th |
What Grok 3 Pro is good for
Grok 3 Pro sits in the frontier tier of the index. It is aimed at work where answer quality matters more than unit cost: hard reasoning, multi-step coding, document analysis and multimodal inputs. At $16.61 per million input tokens and a 400,000-token context window, it is a premium option, so reserve it for tasks where a cheaper model measurably fails.
Strengths
- Top-tier average benchmark score (83.8), placing it #63 of 600.
- Large 400,000-token context window for long documents and agent traces.
- Accepts more than text, including image input where the provider supports it.
- Reasoning-oriented profile, useful for multi-step problems and structured analysis.
- Coding benchmarks are a relative strength within its tier.
Trade-offs
- Proprietary licence: you cannot download the weights or self-host the model.
- Premium input pricing at $16.61 per million tokens.
- Cost can climb quickly on long outputs and high-volume traffic.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Claude Haiku 4.5 Max | Anthropic | 200000 | $15.98 | 83.8 |
| Claude Sonnet 4.5 Vision | Anthropic | 128000 | $16.99 | 83.8 |
| GPT-4.1 Reasoning | OpenAI | 1000000 | $16.97 | 83.8 |
| Gemini 2.5 Pro Reasoning | Google DeepMind | 128000 | $16.81 | 83.8 |
| Grok 3 Pro | xAI | 400000 | $16.61 | 83.8 |
| DeepSeek-V3.2 Instruct | DeepSeek | 128000 | $5.91 | 83.7 |
FAQ
How much does Grok 3 Pro cost?
Grok 3 Pro is listed at $16.61 per million input tokens and $73.49 per million output tokens. Cached input is $2.26 per million tokens. A blended 3:1 input-to-output mix is about $30.83 per million tokens.
What is the context window of Grok 3 Pro?
Grok 3 Pro has a context window of 400,000 tokens and can emit up to 4,096 output tokens per request in this index.
Is Grok 3 Pro open weights?
No. Grok 3 Pro is a proprietary model with a proprietary licence, so you cannot download the weights.
How does Grok 3 Pro score on benchmarks?
Grok 3 Pro averages 83.8 across the scored benchmarks in this index, ranking #63 of 600 models. Its strongest relative result is Arena Elo at 1448.4.
What is Grok 3 Pro best for?
Grok 3 Pro sits in the frontier tier of the index. It is aimed at work where answer quality matters more than unit cost: hard reasoning, multi-step coding, document analysis and multimodal inputs. At $16.61 per million input tokens and a 400,000-token context window, it is a premium option, so reserve it for tasks where a cheaper model measurably fails.