Model comparison
Gemini 3.8 Flash vs GPT-5.4 Pro
Gemini 3.8 Flash and GPT-5.4 Pro score almost the same on the Noometry Index (59.5 vs 58.8), so choose on price, context window or the category you care about most.
Last verified . 8 shared benchmarks.
GoogleSummary
- They share 8 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 2 categories and GPT-5.4 Pro in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in coding, where Gemini 3.8 Flash leads 56.4 to 42.6.
- The biggest single-benchmark swing is FrontierMath Tier 4: 22% for Gemini 3.8 Flash and 58.5% for GPT-5.4 Pro.
- Gemini 3.8 Flash is cheaper at $0.75 / $3.75 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 1.05M.
Side by side
| Gemini 3.8 Flash | GPT-5.4 Pro | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 59.5 | 58.8 |
| Released | 2026-09-02 | 2026-03-05 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1.05M |
| Max output | 66K | 128K |
| Input $ / M tokens | $0.75 | $30 |
| Output $ / M tokens | $3.75 | $180 |
| Results tracked | 46 | 16 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Gemini 3.8 Flash leads
Gemini 3.8 Flash: 56.4 (#17), GPT-5.4 Pro: 42.6 (#89)
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| CursorBench | 39.6% | — |
| LMArena WebDev | 1581 | — |
| FrontierSWE | 19.6% | — |
| SciCode | 56.6% | — |
| WeirdML | — | 57.4% |
| LMArena Coding | 1512 | — |
| ALE-Bench | 1,270 | — |
Agentic & Tool Use Not comparable
Gemini 3.8 Flash: 40.3 (#22), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| APEX-Agents | 64.3% | — |
| GDP.pdf | 23.4% | — |
| Vending-Bench 2 | 5,094 | — |
Reasoning GPT-5.4 Pro leads
Gemini 3.8 Flash: 64.7 (#13), GPT-5.4 Pro: 71.0 (#10)
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| CritPt | 18.3% | 30% |
| Chess Puzzles | 61% | 58.6% |
| Epoch Capabilities Index | 157.13 | 159.12 |
| ARC-AGI-2 | — | 83.3% |
| SimpleBench | — | 74.1% |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | — | 94.5% |
| EnigmaEval | — | 23.8% |
| LMArena Hard Prompts | 1506 | — |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
Math GPT-5.4 Pro leads
Gemini 3.8 Flash: 65.2 (#22), GPT-5.4 Pro: 72.0 (#17)
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 68.4% | 82.5% |
| FrontierMath Tier 4 | 22% | 58.5% |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| ProofBench | 48% | — |
| LMArena Math | 1528 | — |
| FrontierMath (Feb 2025 set) | — | 50% |
| FrontierMath Tier 4 (v1) | — | 37.5% |
Knowledge Gemini 3.8 Flash leads
Gemini 3.8 Flash: 74.9 (#2), GPT-5.4 Pro: 68.3 (#6)
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| GPQA Diamond | 95.4% | 94.6% |
| Humanity's Last Exam | 44.5% | 44.3% |
| SimpleQA Verified | 69.7% | 46.3% |
| Vectara Hallucination Rate | — | 8.3% |
| LMArena Expert | 1529 | — |
Multimodal Not comparable
Gemini 3.8 Flash: 40.9 (#33), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| LMArena Vision | 1312 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |
Multilingual Not comparable
Gemini 3.8 Flash: 57.9 (#5), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| LMArena Non-English | 1486 | — |
| LMArena Chinese | 1547 | — |
| LMArena French | 1502 | — |
| LMArena German | 1470 | — |
| LMArena Japanese | 1505 | — |
| LMArena Korean | 1479 | — |
| LMArena Russian | 1507 | — |
| LMArena Spanish | 1492 | — |
Instruction Following Not comparable
Gemini 3.8 Flash: 78.2 (#11), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| LMArena Instruction Following | 1489 | — |
Long Context Not comparable
Gemini 3.8 Flash: 46.2 (#23), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| LMArena Longer Query | 1506 | — |
Writing & Preference Not comparable
Gemini 3.8 Flash: 72.1 (#16), GPT-5.4 Pro: —
| Benchmark | Gemini 3.8 Flash | GPT-5.4 Pro |
|---|---|---|
| LMArena Text | 1494 | — |
| LMArena Creative Writing | 1485 | — |
| EQ-Bench Creative Writing | 1748 | — |
| LMArena Multi-Turn | 1503 | — |
Frequently asked questions
Is Gemini 3.8 Flash better than GPT-5.4 Pro?
Gemini 3.8 Flash and GPT-5.4 Pro score almost the same on the Noometry Index (59.5 vs 58.8), so choose on price, context window or the category you care about most.
Which is cheaper, Gemini 3.8 Flash or GPT-5.4 Pro?
Gemini 3.8 Flash is cheaper. It lists at $0.75 per million input tokens and $3.75 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is Gemini 3.8 Flash or GPT-5.4 Pro better for coding?
Gemini 3.8 Flash scores higher on coding benchmarks: 56.4 versus 42.6 in the Noometry coding category.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 1.05M.
How many benchmarks do Gemini 3.8 Flash and GPT-5.4 Pro share?
8 benchmarks have published results for both models. Gemini 3.8 Flash has 46 scored results on Noometry and GPT-5.4 Pro has 16.