Model comparison
o3 vs o3-mini
Head-to-head evidence from 5 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the o3 family.
Public leaderboard positions: o3 #131 (Supported); o3-mini #136 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. o3 and o3-mini share 5 comparable benchmark results. 0 of 8 categories are comparable. 11 results are unique to o3; 5 to o3-mini.
Updated July 23, 2026- Shared results
- 5
- o3 only
- 11
- o3-mini only
- 5
- Comparable categories
- 0 / 8
Benchmark data for o3 and o3-mini is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 5 shared benchmark results across 3 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 is priced at $2.00 input / $8.00 output per 1M tokens, versus $1.10 input / $4.40 output per 1M tokens for o3-mini.
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 | o3 | Δ | o3-mini |
|---|---|---|---|
| Coding | o3Not measured | MarginNo overlap | o3-mini49.3 |
| Knowledge | o3Not measured | MarginNo overlap | o3-mini77.2 |
| Math | o314.5 | MarginNo overlap | o3-miniNot measured |
| Inst. Following | o3Not measured | MarginNo overlap | o3-mini93.9 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | o3 | o3-mini | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | o3$2 input / $8 output | o3-mini$1.1 input / $4.4 output | o3-mini has the lower combined listed price. |
| Generation speedtokens per second | o3118 tok/s | o3-mini160 tok/s | o3-mini has the higher measured throughput. |
| First-answer latencyseconds to first token | o35.38 s | o3-mini7.12 s | o3 reaches the first token sooner. |
| Context windowmaximum listed tokens | o3200K | o3-mini200K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | o3 | o3-mini | Result |
|---|---|---|---|
| τ²-bench resultsSource | 80.7% | 28.7% | o3 leads |
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | o3 | o3-mini | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 30.4% | 19.0% | o3 leads |
| AA-GPQA DiamondSource | 82.7% | 74.8% | o3 leads |
| AA-HLESource | 20.0% | 8.7% | o3 leads |
| AA-Omniscience IndexSource | -15.3% | — | Not comparable |
| AA-Omniscience AccuracySource | 38.4% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 87.1% | — | Not comparable |
| MMLUSource | — | 86.9% | Not comparable |
| GPQASource | — | 77.2% | Not comparable |
Math4 benchmarks
Multimodal2 benchmarks
Frequently Asked Questions (3)
Can I compare o3 and o3-mini 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 o3 and o3-mini today?
o3: $2.00 input / $8.00 output per 1M tokens o3-mini: $1.10 input / $4.40 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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