Grok 3 Reasoning: pricing, context window and benchmarks
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.
Pricing
Grok 3 Reasoning costs $16.07 per million input tokens and $74.65 per million output tokens. A blended 3:1 input-to-output mix works out to about $30.72 per million tokens. Cached input is listed at $2.14 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $16.07 | per 1M tokens |
| Output | $74.65 | per 1M tokens |
| Cached input | $2.14 | per 1M tokens |
| Blended 3:1 | $30.72 | estimate per 1M tokens |
| 1M in + 1M out | $90.72 | 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 | 84.5 | 72 | 88th | |
| GPQA Diamond | 77.3 | 101 | 83th | |
| SWE-bench Verified | 74.0 | 53 | 91th | |
| HumanEval | 88.5 | 65 | 89th | |
| MATH-500 | 90.2 | 47 | 92th | |
| AIME 2025 | 78.2 | 113 | 81th | |
| LiveCodeBench | 76.5 | 76 | 87th | |
| IFEval | 90.2 | 68 | 89th | |
| TruthfulQA | 83.4 | 97 | 84th | |
| HellaSwag | 89.7 | 95 | 84th | |
| MMMU | 79.4 | 68 | 89th | |
| Arena Elo | 1448.0 | 79 | 87th |
What Grok 3 Reasoning is good for
Grok 3 Reasoning 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 $16.07 per million input tokens and a 200,000-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 (82.9), placing it #76 of 600.
- Large 200,000-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 $16.07 per million tokens.
- Cost can climb quickly on long outputs and high-volume traffic.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| DeepSeek-R1 Instruct | DeepSeek | 1000000 | $5.90 | 83.1 |
| Kimi K2 | Moonshot AI | 128000 | $5.85 | 83.0 |
| GPT-4.1 Turbo | OpenAI | 1000000 | $16.12 | 82.9 |
| Grok 3 Reasoning | xAI | 200000 | $16.07 | 82.9 |
| DeepSeek-R1 | DeepSeek | 128000 | $5.83 | 82.8 |
| Grok 3 | xAI | 128000 | $15.84 | 82.8 |
FAQ
How much does Grok 3 Reasoning cost?
Grok 3 Reasoning is listed at $16.07 per million input tokens and $74.65 per million output tokens. Cached input is $2.14 per million tokens. A blended 3:1 input-to-output mix is about $30.72 per million tokens.
What is the context window of Grok 3 Reasoning?
Grok 3 Reasoning has a context window of 200,000 tokens and can emit up to 16,384 output tokens per request in this index.
Is Grok 3 Reasoning open weights?
No. Grok 3 Reasoning is a proprietary model with a proprietary licence, so you cannot download the weights.
How does Grok 3 Reasoning score on benchmarks?
Grok 3 Reasoning averages 82.9 across the scored benchmarks in this index, ranking #76 of 600 models. Its strongest relative result is Arena Elo at 1448.0.
What is Grok 3 Reasoning best for?
Grok 3 Reasoning 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 $16.07 per million input tokens and a 200,000-token context window, it is a premium option, so reserve it for tasks where a cheaper model measurably fails.