GPT-4o vs Grok Code Fast 1
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
GPT-4o
OpenAI · May 2024
The 2024 omni-modal classic with native audio in and out; superseded at the frontier but still everywhere in production.
Grok Code Fast 1
xAI · Aug 2025
A speed-first coding model built for agentic IDE loops, popular as a cheap fast tier in Cursor and similar tools.
The verdict
Grok Code Fast 1 wins 1 of the 1 benchmarks these models share, against 0 for GPT-4o. On price the gap is dramatic: Grok Code Fast 1 works out roughly 8.3x cheaper per blended million tokens. Grok Code Fast 1 also takes 256K of context versus 128K for GPT-4o.
Benchmark head-to-head 0–1
Specs & pricing
| GPT-4o | Grok Code Fast 1 | |
|---|---|---|
| modhub Index | — | — |
| Input price / 1M | $2.5 | $0.2 |
| Output price / 1M | $10 | $1.5 |
| Context window | 128K | 256K |
| Max output | 16K | — |
| Open weights | no | no |
| Reasoning model | no | yes |
| Multimodal input | text, image, audio | text |
| Knowledge cutoff | Oct 2023 | Aug 2025 |
| Released | May 2024 | Aug 2025 |
| Example monthly cost* | $40.00 | $4.25 |
* 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, GPT-4o or Grok Code Fast 1?
- Grok Code Fast 1 wins 1 of the 1 benchmarks these models share, against 0 for GPT-4o. On price the gap is dramatic: Grok Code Fast 1 works out roughly 8.3x cheaper per blended million tokens. Grok Code Fast 1 also takes 256K of context versus 128K for GPT-4o.
- Which is cheaper, GPT-4o or Grok Code Fast 1?
- GPT-4o costs $2.5/$10 per million input/output tokens, while Grok Code Fast 1 costs $0.2/$1.5. For a typical workload of 10M input and 1.5M output tokens per month, that's $40.00 versus $4.25.
- Which model is better for coding, GPT-4o or Grok Code Fast 1?
- On SWE-bench Verified — the standard agentic-coding benchmark — Grok Code Fast 1 scores 70.8% versus 33.2% for GPT-4o, making Grok Code Fast 1 the stronger pick for coding agents.