OpenAI: o1-pro (batch) vs SpaceXAI: Grok 4.20
Head-to-head API pricing and cost comparison between OpenAI’s OpenAI: o1-pro (batch) and xAI’s SpaceXAI: Grok 4.20. Prices auto-refresh daily from OpenRouter.
SpaceXAI: Grok 4.20 is 98% cheaper for input tokens; SpaceXAI: Grok 4.20 also wins on output tokens.
Side-by-side comparison
| Spec | OpenAI: o1-pro (batch) | SpaceXAI: Grok 4.20 |
|---|---|---|
| Input price (per 1M) | $75.00 | $1.25 |
| Cached input (per 1M) | — | $0.20 |
| Output price (per 1M) | $300.00 | $2.50 |
| Batch input (per 1M) | $37.50 | — |
| Batch output (per 1M) | $150.00 | — |
| Reasoning price (per 1M) | — | — |
| Context window | 200K | 2000K |
| Vision support | Yes | Yes |
| Caching support | No | Yes |
| Batch API | Yes | No |
| Reasoning capability | Yes | No |
Monthly cost at volume
Estimated monthly API spend at common production traffic levels (input/output tokens per request shown).
| Volume | OpenAI: o1-pro (batch) | SpaceXAI: Grok 4.20 | Savings |
|---|---|---|---|
1K req/day 500in / 200out tokens | $2,925 | $33.75 | $2,891 SpaceXAI: Grok 4.20 wins |
10K req/day 1500in / 500out tokens | $78,750 | $937.50 | $77,813 SpaceXAI: Grok 4.20 wins |
100K req/day 3000in / 800out tokens | $1,395,000 | $17,250 | $1,377,750 SpaceXAI: Grok 4.20 wins |
1M req/day 8000in / 2000out tokens | $36,000,000 | $450,000 | $35,550,000 SpaceXAI: Grok 4.20 wins |
Adjust input/output token counts, request volume, batch & cached pricing.
Related comparisons
Frequently asked questions
Which is cheaper, OpenAI: o1-pro (batch) or SpaceXAI: Grok 4.20?
For input tokens, SpaceXAI: Grok 4.20 is roughly 98% cheaper at $1.25/1M vs $75.00/1M. For output tokens, SpaceXAI: Grok 4.20 wins at $2.50/1M. Real-world cost depends on your input/output ratio — use the calculator to model your actual workload.
What’s the context window difference?
OpenAI: o1-pro (batch) has a context window of 200K tokens. SpaceXAI: Grok 4.20 offers 2000K tokens. Larger context windows are valuable for long documents, RAG pipelines, and multi-turn conversations — but they come with higher input-token bills if you fill them every request.
Should I use OpenAI: o1-pro (batch) or SpaceXAI: Grok 4.20?
Choose OpenAI: o1-pro (batch) if you’re already on the OpenAI stack, want reasoning capabilities, or prefer its feature set. Choose SpaceXAI: Grok 4.20 for xAI’s ecosystem, native vision input, or its cheaper input tokens. Run a small benchmark on your own prompts before committing — price is only one axis.
How are these prices kept current?
Prices are pulled directly from OpenRouter’s public models API once every 24 hours via a Convex cron job, then normalized to per-1M-token figures. Last refresh: Aug 27, 2026.