Specifications & Benchmarks
| GPT-5.1-Codex-Max | Grok 4.1 Fast | |
|---|---|---|
| General | ||
| Provider | OpenAI | xAI |
| Context Length | 400,000 tokens | 2,000,000 tokens |
| Capabilities | ||
| Reasoning | ||
| Vision | ||
| Image Generation | ||
| Video Generation | ||
| Pricing | ||
| Input (per 1M tokens) | $1.25 | $0.20 |
| Output (per 1M tokens) | $10.00 | $0.50 |
| Benchmarks | ||
Money Balance ($) | — | 1,106.63(#8) |
Intelligence Index | — | 64.0(#15) |
Why Pay for Multiple Subscriptions?
Comparing GPT-5.1-Codex-Max from OpenAI with Grok 4.1 Fast from xAI? Instead of managing separate API keys and subscriptions, get both with Writingmate.
| Plan | Price | GPT-5.1-Codex-Max | Grok 4.1 Fast | AI Images | AI Video |
|---|---|---|---|---|---|
ChatGPT Plus GPT-5.2 (limited) | $20/mo | DALL-E | Sora (limited) | ||
X Premium+ Priority responses | $16/mo | Aurora | — | ||
Writingmate Pro Most popular | $20/mo | Nano Banana Pro, FLUX.2, DALL-E & more | Sora 2, VEO 3.1 | ||
Writingmate Ultimate Power users | $60/mo | Nano Banana Pro, FLUX.2, DALL-E & more | Sora 2, VEO 3.1 |