Model comparison
Grok 4.20 vs o3-pro
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok 4.20 #93 (Estimated); o3-pro #133 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4.20 and o3-pro share 0 comparable benchmark results. 0 of 8 categories are comparable. 19 results are unique to Grok 4.20; 2 to o3-pro.
Updated July 28, 2026- Shared results
- 0
- Grok 4.20 only
- 19
- o3-pro only
- 2
- Comparable categories
- 0 / 8
Benchmark data for Grok 4.20 and o3-pro is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
o3-pro is priced at $20.00 input / $80.00 output per 1M tokens, versus $2.00 input / $6.00 output per 1M tokens for Grok 4.20. Grok 4.20 has the larger context window at 2M, compared with 200K for o3-pro.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4.20 | o3-pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4.20$2 input / $6 output | o3-pro$20 input / $80 output | Grok 4.20 has the lower combined listed price. |
| Generation speedtokens per second | Grok 4.20233 tok/s | o3-pro27 tok/s | Grok 4.20 has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok 4.2010.33 s | o3-pro84.93 s | Grok 4.20 reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok 4.202M | o3-pro200K | Grok 4.20 lists the larger context window. |
Benchmark Deep Dive
Agentic3 benchmarks
Coding4 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
Frequently Asked Questions (3)
Can I compare Grok 4.20 and o3-pro on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Grok 4.20 and o3-pro today?
Grok 4.20: $2.00 input / $6.00 output per 1M tokens o3-pro: $20.00 input / $80.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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