Gemini 2.5 Flash vs Mistral Medium 3
Updated October 21, 2026. 57 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Neither model has a coding score yet, so the two cannot be ranked on coding.
Gemini 2.5 Flash has the edge where the context window is larger, 1.05M against 131K tokens, and where what matters is Design Arena: websites or Design Arena: UI components, where it leads.
- Shared results
- 57
- Gemini 2.5 Flash only
- 12
- Mistral Medium 3 only
- 0
- Like-for-like categories
- 8 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
Gemini 2.5 Flash
Gemini 2.5 Flash leads, 15.5 against 9.0.
Same board, both measured
Web design
Design Arena: websites
Mistral Medium 3
Mistral Medium 3 leads, 1079 against 1074.
Same board, both measured
Long documents
Listed context window
Gemini 2.5 Flash
Gemini 2.5 Flash takes 1.05M tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Mistral Medium 3
Gemini 2.5 Flash $0.0015, Mistral Medium 3 $0.0014 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only Gemini 2.5 Flash has the number, $0.466.
Directional only
At a glance
- Coding index
- Gemini 2.5 Flash not benchmarked, Mistral Medium 3 not benchmarked.
- Widest category
- Math, 26.8 points apart on average over 4 shared benchmarks.
- Widest single gap
- AA Math Index: Gemini 2.5 Flash 73.3 against Mistral Medium 3 30.3, 43.0 points apart on a 0 to 100 scale.
- Output price
- Gemini 2.5 Flash $2.50 against Mistral Medium 3 $2.00 per million output tokens, 1.3x apart.
- Context window
- Gemini 2.5 Flash takes 1.05M tokens, Mistral Medium 3 131K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Gemini 2.5 Flash | Bars | Mistral Medium 3 | Ties |
|---|---|---|---|---|
| Coding | 4 | 0 | ||
| Intelligence | 2 | 0 | ||
| Agentic work | 1 | 0 | ||
| Reasoning | 7 | 0 | ||
| Math | 4 | 0 | ||
| Knowledge | 5 | 0 | ||
| Web design | 1 | 5 | ||
| General | 28 | 0 | ||
| All shared boards | 52 | 5 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index40
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| SWE-bench Verified | 28.7% | Not measured | Only Gemini 2.5 Flash measured |
| LiveCodeBench (Artificial Analysis run) | 69.5% | 40.0% | Gemini 2.5 Flash |
| Terminal-Bench Hard (Artificial Analysis run) | 13.6% | 3.8% | Gemini 2.5 Flash |
| Terminal-Bench | 17.1% | Not measured | Only Gemini 2.5 Flash measured |
| LMArena Text: coding | 1423 | 1385 | Gemini 2.5 Flash |
| LMArena Text: software and IT | 1425 | 1385 | Gemini 2.5 Flash |
| Neither model has a result on the other 32 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| AA Intelligence Index | 15.5 | 9.0 | Gemini 2.5 Flash |
| Epoch Capabilities Index | 142.9 | 134.0 | Gemini 2.5 Flash |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| τ²-Bench Telecom | 31.6% | 24.3% | Gemini 2.5 Flash |
| BALROG | 33.5% | Not measured | Only Gemini 2.5 Flash measured |
| Vending-Bench 2 | $549 | Not measured | Only Gemini 2.5 Flash measured |
| Neither model has a result on the other 36 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index70
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | 79.0% | 57.8% | Gemini 2.5 Flash |
| Humanity's Last Exam (Artificial Analysis run) | 12.1% | 4.1% | Gemini 2.5 Flash |
| ARC-AGI | 33.3% | Not measured | Only Gemini 2.5 Flash measured |
| ARC-AGI-2 | 2.5% | Not measured | Only Gemini 2.5 Flash measured |
| SimpleBench | 41.2% | Not measured | Only Gemini 2.5 Flash measured |
| LMArena Text: hard prompts | 1422 | 1364 | Gemini 2.5 Flash |
| LMArena Text: expert | 1426 | 1342 | Gemini 2.5 Flash |
| LMArena Text: hard prompts in English | 1420 | 1374 | Gemini 2.5 Flash |
| LMArena Vision: diagrams | 1245 | 1155 | Gemini 2.5 Flash |
| LMArena Vision: homework | 1244 | 1165 | Gemini 2.5 Flash |
| Neither model has a result on the other 11 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index40
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| AA Math Index | 73.3 | 30.3 | Gemini 2.5 Flash |
| AIME 2025 (Artificial Analysis run) | 73.3% | 30.3% | Gemini 2.5 Flash |
| LMArena Text: math | 1411 | 1353 | Gemini 2.5 Flash |
| LMArena Text: mathematical work | 1422 | 1354 | Gemini 2.5 Flash |
| Neither model has a result on the other 9 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 40.4% | Not measured | Only Gemini 2.5 Flash measured |
| MMLU Pro (Artificial Analysis run) | 83.2% | 76.0% | Gemini 2.5 Flash |
| LMArena Text: science | 1433 | 1381 | Gemini 2.5 Flash |
| LMArena Text: medicine and healthcare | 1428 | 1381 | Gemini 2.5 Flash |
| LMArena Text: legal and government | 1430 | 1384 | Gemini 2.5 Flash |
| LMArena Text: business and finance | 1404 | 1352 | Gemini 2.5 Flash |
| Neither model has a result on the other 11 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index15
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| Design Arena: websites | 1074 | 1079 | Mistral Medium 3 |
| Design Arena: UI components | 1005 | 1024 | Mistral Medium 3 |
| Design Arena: game dev | 1005 | 1018 | Mistral Medium 3 |
| Design Arena: data viz | 1060 | 1034 | Gemini 2.5 Flash |
| Design Arena: 3D | 1021 | 1083 | Mistral Medium 3 |
| Design Arena: all code categories | 1059 | 1069 | Mistral Medium 3 |
| Design Arena: SVG | 1020 | Not measured | Only Gemini 2.5 Flash measured |
| Neither model has a result on the other 2 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index280
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| SAGE (Vals AI) | 44.8% | Not measured | Only Gemini 2.5 Flash measured |
| MedScribe (Vals AI) | 83.0% | Not measured | Only Gemini 2.5 Flash measured |
| IFBench | 50.3% | 39.3% | Gemini 2.5 Flash |
| Long context reasoning (AA-LCR) | 65.3% | 31.3% | Gemini 2.5 Flash |
| DTBench | 76.5% | 62.3% | Gemini 2.5 Flash |
| LMCA | 27.5% | Not measured | Only Gemini 2.5 Flash measured |
| LMArena Text | 1417 | 1370 | Gemini 2.5 Flash |
| LMArena Text: instruction following | 1405 | 1338 | Gemini 2.5 Flash |
| LMArena Text: creative writing | 1400 | 1343 | Gemini 2.5 Flash |
| LMArena Vision | 1235 | 1157 | Gemini 2.5 Flash |
| LMArena Text: English | 1418 | 1385 | Gemini 2.5 Flash |
| LMArena Text: non-English | 1409 | 1353 | Gemini 2.5 Flash |
| LMArena Text: Chinese | 1449 | 1374 | Gemini 2.5 Flash |
| LMArena Text: German | 1417 | 1377 | Gemini 2.5 Flash |
| LMArena Text: Japanese | 1396 | 1316 | Gemini 2.5 Flash |
| LMArena Text: Korean | 1385 | 1304 | Gemini 2.5 Flash |
| LMArena Text: French | 1432 | 1368 | Gemini 2.5 Flash |
| LMArena Text: Spanish | 1422 | 1364 | Gemini 2.5 Flash |
| LMArena Text: Russian | 1415 | 1359 | Gemini 2.5 Flash |
| LMArena Text: Polish | 1413 | 1371 | Gemini 2.5 Flash |
| LMArena Text: multi-turn | 1408 | 1384 | Gemini 2.5 Flash |
| LMArena Text: longer queries | 1419 | 1360 | Gemini 2.5 Flash |
| LMArena Text: writing and language | 1405 | 1352 | Gemini 2.5 Flash |
| LMArena Text: entertainment and media | 1393 | 1335 | Gemini 2.5 Flash |
| LMArena Vision: English | 1239 | 1172 | Gemini 2.5 Flash |
| LMArena Vision: Chinese | 1284 | 1161 | Gemini 2.5 Flash |
| LMArena Vision: reading text | 1237 | 1154 | Gemini 2.5 Flash |
| LMArena Vision: humor | 1225 | 1145 | Gemini 2.5 Flash |
| LMArena Vision: captioning | 1277 | 1094 | Gemini 2.5 Flash |
| LMArena Vision: recognizing things | 1252 | 1141 | Gemini 2.5 Flash |
| LMArena Vision: creative writing | 1241 | 1146 | Gemini 2.5 Flash |
| Neither model has a result on the other 15 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Gemini 2.5 Flash | Mistral Medium 3 | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Mistral Medium 3 costs less
Repository review
50K input + 3K output tokens
Gemini 2.5 Flash costs less
Agent loop
200K input + 10K output tokens
Gemini 2.5 Flash costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Google Gemini 2.5 Flash | Mistral Medium 3 |
|---|---|---|
| Maker | Mistral AI | |
| Weights | No public weights listed | No public weights listed |
| Released | June 17, 2025 | May 7, 2025 |
| Context window | 1.05M | 131K |
| Input $/Mtok | $0.30 | $0.40 |
| Output $/Mtok | $2.50 | $2.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | $0.466 | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Gemini 2.5 Flash better than Mistral Medium 3 for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Gemini 2.5 Flash has the edge where the context window is larger, 1.05M against 131K tokens, and where what matters is Design Arena: websites or Design Arena: UI components, where it leads.
Which is cheaper, Gemini 2.5 Flash or Mistral Medium 3?
Gemini 2.5 Flash costs $0.30 per million input tokens and $2.50 per million output tokens; Mistral Medium 3 costs $0.40 and $2.00. Cost per solved task is known for Gemini 2.5 Flash only.
Which has the bigger context window, Gemini 2.5 Flash or Mistral Medium 3?
Gemini 2.5 Flash, with 1.05M tokens against 131K.
How many benchmarks is the Gemini 2.5 Flash vs Mistral Medium 3 comparison based on?
57 benchmarks have a result for both models as of October 21, 2026. Gemini 2.5 Flash's coding index rests on 0 independent benchmarks and Mistral Medium 3's on 0. Where only one model has a result, the page says so instead of naming a winner.