Model comparison
Gemini 3.1 Flash-Lite vs o3
Head-to-head evidence from 12 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemini 3.1 Flash-Lite #111 (Supported); o3 #131 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3.1 Flash-Lite and o3 share 12 comparable benchmark results. 0 of 8 categories are comparable. 8 results are unique to Gemini 3.1 Flash-Lite; 4 to o3.
Updated July 22, 2026- Shared results
- 12
- Gemini 3.1 Flash-Lite only
- 8
- o3 only
- 4
- Comparable categories
- 0 / 8
Benchmark data for Gemini 3.1 Flash-Lite and o3 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 6 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 $0.25 input / $1.50 output per 1M tokens for Gemini 3.1 Flash-Lite. Gemini 3.1 Flash-Lite has the larger context window at 1M, compared with 200K for o3.
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 | Gemini 3.1 Flash-Lite | Δ | o3 |
|---|---|---|---|
| Math | Gemini 3.1 Flash-LiteNot measured | MarginNo overlap | o314.5 |
| Multimodal | Gemini 3.1 Flash-Lite73.2 | MarginNo overlap | o3Not measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3.1 Flash-Lite | o3 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3.1 Flash-Lite$0.25 input / $1.5 output | o3$2 input / $8 output | Gemini 3.1 Flash-Lite has the lower combined listed price. |
| Generation speedtokens per second | Gemini 3.1 Flash-Lite205 tok/s | o3118 tok/s | Gemini 3.1 Flash-Lite has the higher measured throughput. |
| First-answer latencyseconds to first token | Gemini 3.1 Flash-Lite7.50 s | o35.38 s | o3 reaches the first token sooner. |
| Context windowmaximum listed tokens | Gemini 3.1 Flash-Lite1M | o3200K | Gemini 3.1 Flash-Lite lists the larger context window. |
Benchmark Deep Dive
Agentic6 benchmarks
Coding3 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Gemini 3.1 Flash-Lite | o3 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 25.0% | 30.4% | o3 leads |
| AA-GPQA DiamondSource | 82.2% | 82.7% | o3 leads |
| AA-HLESource | 16.2% | 20.0% | o3 leads |
| AA-Omniscience IndexSource | -15.5% | -15.3% | o3 leads |
| AA-Omniscience AccuracySource | 36.4% | 38.4% | o3 leads |
| AA-Omniscience Hallucination RateSource | 81.6% | 87.1% | Gemini 3.1 Flash-Lite leads |
Math3 benchmarks
Multimodal3 benchmarks
Inst. Following1 benchmarks
| Benchmark | Gemini 3.1 Flash-Lite | o3 | Result |
|---|---|---|---|
| AA-IFBenchSource | 77.2% | 71.4% | Gemini 3.1 Flash-Lite leads |
Frequently Asked Questions (3)
Can I compare Gemini 3.1 Flash-Lite and o3 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 Gemini 3.1 Flash-Lite and o3 today?
Gemini 3.1 Flash-Lite: $0.25 input / $1.50 output per 1M tokens o3: $2.00 input / $8.00 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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