Model comparison
Grok Code Fast 1 vs o3-pro
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok Code Fast 1 #180 (Supported); o3-pro #127 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok Code Fast 1 and o3-pro share 2 comparable benchmark results. 0 of 8 categories are comparable. 10 results are unique to Grok Code Fast 1; 0 to o3-pro.
Updated July 22, 2026- Shared results
- 2
- Grok Code Fast 1 only
- 10
- o3-pro only
- 0
- Comparable categories
- 0 / 8
Benchmark data for Grok Code Fast 1 and o3-pro is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 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 $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. Grok Code Fast 1 has the larger context window at 256K, compared with 200K for o3-pro.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Grok Code Fast 1 | Δ | o3-pro |
|---|---|---|---|
| Coding | Grok Code Fast 170.8 | MarginNo overlap | o3-proNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok Code Fast 1 | o3-pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok Code Fast 1$0.2 input / $1.5 output | o3-pro$20 input / $80 output | Grok Code Fast 1 has the lower combined listed price. |
| Generation speedtokens per second | Grok Code Fast 1172 tok/s | o3-pro27 tok/s | Grok Code Fast 1 has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok Code Fast 12.81 s | o3-pro84.93 s | Grok Code Fast 1 reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok Code Fast 1256K | o3-pro200K | Grok Code Fast 1 lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Grok Code Fast 1 | o3-pro | Result |
|---|---|---|---|
| τ²-bench resultsSource | 75.7% | — | Not comparable |
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Grok Code Fast 1 | o3-pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 21.6% | 32.5% | o3-pro leads |
| AA-GPQA DiamondSource | 72.7% | 84.5% | o3-pro leads |
| AA-HLESource | 7.5% | — | Not comparable |
| AA-Omniscience IndexSource | -36.0% | — | Not comparable |
| AA-Omniscience AccuracySource | 23.8% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 78.5% | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Grok Code Fast 1 | o3-pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 41.4% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Grok Code Fast 1 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 Code Fast 1 and o3-pro today?
Grok Code Fast 1: $0.20 input / $1.50 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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