Grok 4.20 vs o4-mini
Grok 4.20 and o4-mini are both current production-tier models. o4-mini is meaningfully cheaper at $1.1 / $4.4 per 1M. Grok 4.20 has a 2M context window — about 10× the 200k of o4-mini. Grok 4.20 leads on long-context retrieval.
Specs side by side
| Metric | xAI Grok 4.20 | OpenAI o4-mini |
|---|---|---|
| Input price (per 1M) | $2 | $1.1 |
| Output price (per 1M) | $6 | $4.4 |
| Context window | 2M tokens | 200k tokens |
| Speed tier | balanced | slow |
| Open weights | No | No |
| EU region | No | Yes |
| Free tier | No | No |
| Prompt caching | Yes | Yes |
| Vision input | Yes | Yes |
| Extended thinking | Yes | Yes |
When to choose each
Choose Grok 4.20 if…
- You need 2M context (10× more than o4-mini)
- Long-context retrieval is central to your workload
Choose o4-mini if…
- EU data residency is required
- HIPAA eligibility is required
Benchmark delta
Grok 4.20 leads on
- Long-context retrieval
o4-mini leads on
o4-mini has no meaningful benchmark lead in this pair.
FAQ — Grok 4.20 vs o4-mini
Grok 4.20 vs o4-mini — which is better?
Grok 4.20 and o4-mini are both current production-tier models. o4-mini is meaningfully cheaper at $1.1 / $4.4 per 1M. Grok 4.20 has a 2M context window — about 10× the 200k of o4-mini. Grok 4.20 leads on long-context retrieval. The right pick depends on your use case — see "When to choose each" above for a data-driven decision.
How does Grok 4.20 pricing compare to o4-mini?
Grok 4.20 costs $2 / $6 per 1M vs o4-mini at $1.1 / $4.4 per 1M. o4-mini is cheaper on output tokens by roughly 36%. Both support prompt caching, which reduces effective cost by 80-90% on repeat system prompts.
Does Grok 4.20 or o4-mini have the bigger context window?
Grok 4.20 has a 2M-token context window — 10× the 200k context of o4-mini. Enough for entire codebases, books, or multi-document RAG.
Is there a free tier for Grok 4.20 or o4-mini?
Grok 4.20: no — X Premium includes Grok web chat; API is paid. o4-mini: no — Paid-only.
Which is better for coding — Grok 4.20 or o4-mini?
o4-mini leads on coding benchmarks (Grok 4.20: 91/100, o4-mini: 92/100). For production coding agents also weigh tool-use performance — Grok 4.20 scores 88, o4-mini scores 88.