Grok 4 vs OpenAI o4-mini
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Grok 4
xAI · Jul 2025
xAI's mid-2025 flagship, trained on the 200K-GPU Colossus cluster — a math and science reasoning standout of its generation.
OpenAI o4-mini
80.9OpenAI · Apr 2025
A compact reasoning model that punched far above its price on math — 92.7% on AIME 2025 at $1.10 per million input tokens.
The verdict
Grok 4 and OpenAI o4-mini split the 2 benchmarks they share evenly (1–1), so capability alone won't settle this one. On price the gap is dramatic: OpenAI o4-mini works out roughly 3.1x cheaper per blended million tokens. Grok 4 also takes 256K of context versus 200K for OpenAI o4-mini.
Benchmark head-to-head 1–1
Specs & pricing
| Grok 4 | OpenAI o4-mini | |
|---|---|---|
| modhub Index | — | 80.9 |
| Input price / 1M | $3 | $1.1 |
| Output price / 1M | $15 | $4.4 |
| Context window | 256K | 200K |
| Max output | — | 100K |
| Open weights | no | no |
| Reasoning model | yes | yes |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Jul 2025 | May 2024 |
| Released | Jul 2025 | Apr 2025 |
| Example monthly cost* | $52.50 | $17.60 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Grok 4 or OpenAI o4-mini?
- Grok 4 and OpenAI o4-mini split the 2 benchmarks they share evenly (1–1), so capability alone won't settle this one. On price the gap is dramatic: OpenAI o4-mini works out roughly 3.1x cheaper per blended million tokens. Grok 4 also takes 256K of context versus 200K for OpenAI o4-mini.
- Which is cheaper, Grok 4 or OpenAI o4-mini?
- Grok 4 costs $3/$15 per million input/output tokens, while OpenAI o4-mini costs $1.1/$4.4. For a typical workload of 10M input and 1.5M output tokens per month, that's $52.50 versus $17.60.
- Which model is better for coding, Grok 4 or OpenAI o4-mini?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.