Model comparison
Gemini 3.6 Flash vs GPT-5.4 Pro
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Gemini 3.6 Flash unranked (Not scored); GPT-5.4 Pro #44 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Gemini 3.6 Flash and GPT-5.4 Pro share 1 comparable benchmark result. 1 of 8 categories are comparable. 18 results are unique to Gemini 3.6 Flash; 11 to GPT-5.4 Pro.
Updated July 21, 2026- Shared results
- 1
- Gemini 3.6 Flash only
- 18
- GPT-5.4 Pro only
- 11
- Comparable categories
- 1 / 8
Treat this as a split decision. Gemini 3.6 Flash makes more sense if you want the cheaper token bill; GPT-5.4 Pro is the better fit if agentic is the priority or you need the larger 1.05M context window.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 3.6 Flash and GPT-5.4 Pro finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $1.50 input / $7.50 output per 1M tokens for Gemini 3.6 Flash. That is roughly 24.0x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 1M for Gemini 3.6 Flash.
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 3.6 Flash | Δ | GPT-5.4 Pro |
|---|---|---|---|
| Agentic | Gemini 3.6 Flash83.0 | Margin→ 6.3 | GPT-5.4 Pro89.3 |
| Reasoning | Gemini 3.6 FlashNot measured | MarginNo overlap | GPT-5.4 Pro83.3 |
| Knowledge | Gemini 3.6 FlashNot measured | MarginNo overlap | GPT-5.4 Pro58.7 |
| Math | Gemini 3.6 FlashNot measured | MarginNo overlap | GPT-5.4 Pro46.9 |
| Multimodal | Gemini 3.6 FlashNot measured | MarginNo overlap | GPT-5.4 Pro94.0 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Gemini 3.6 Flash | GPT-5.4 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Gemini 3.6 Flash$1.5 input / $7.5 output | GPT-5.4 Pro$30 input / $180 output | Gemini 3.6 Flash has the lower combined listed price. |
| Generation speedtokens per second | Gemini 3.6 FlashNot available | GPT-5.4 Pro74 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Gemini 3.6 FlashNot available | GPT-5.4 Pro151.79 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Gemini 3.6 Flash1M | GPT-5.4 Pro1.05M | GPT-5.4 Pro lists the larger context window. |
Benchmark Deep Dive
AgenticGPT-5.4 Pro wins8 benchmarks
| Benchmark | Gemini 3.6 Flash | GPT-5.4 Pro | Result |
|---|---|---|---|
| OSWorld-VerifiedSource | 83% | — | Not comparable |
| GDPval-AASource | 1421 | — | Not comparable |
| AA Agentic IndexSource | 38.7% | — | Not comparable |
| GDPval-AASource | 46.1% | — | Not comparable |
| AA BriefcaseSource | 961 | — | Not comparable |
| AA Tau3 BankingSource | 24.5% | — | Not comparable |
| aaTerminalBench21Source | 77.5% | — | Not comparable |
| BrowseCompSource | — | 89.3% | Not comparable |
Coding3 benchmarks
Reasoning3 benchmarks
Knowledge10 benchmarks
| Benchmark | Gemini 3.6 Flash | GPT-5.4 Pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 50.1% | — | Not comparable |
| AA-GPQA DiamondSource | 92.8% | — | Not comparable |
| AA-HLESource | 38.3% | — | Not comparable |
| AA-Omniscience IndexSource | 23.5% | — | Not comparable |
| AA-Omniscience AccuracySource | 50.2% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 53.5% | — | Not comparable |
| HLESource | — | 58.7% | Not comparable |
| FrontierScienceSource | — | 36.7% | Not comparable |
| FrontierScience ResearchSource | — | 36.7% | Not comparable |
| HLE w/o toolsSource | — | 42.7% | Not comparable |
Math4 benchmarks
Frequently Asked Questions (2)
Which is better, Gemini 3.6 Flash or GPT-5.4 Pro?
Gemini 3.6 Flash and GPT-5.4 Pro are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for agentic tasks, Gemini 3.6 Flash or GPT-5.4 Pro?
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 83. Gemini 3.6 Flash stays close enough that the answer can still flip depending on your workload.
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