GPT-6 Astra vs MiMo-V2.6-Pro
GPT-6 Astra leads MiMo-V2.6-Pro on coding, 85.1 to 65.4 on the Vibe Coding Index, and MiMo-V2.6-Pro costs 57.5x less per output token ($0.87 vs $50.00 per million). Updated October 22, 2026; 72 benchmarks have a result for both.
GPT-6 Astra or MiMo-V2.6-Pro: which to pick
Pick GPT-6 Astra for coding: it scores 85.1 on the Vibe Coding Index against 65.4 for MiMo-V2.6-Pro.
Pick MiMo-V2.6-Pro for output tokens 57.5x cheaper ($0.87 vs $50.00 per million) and work measured by CyberBench (Vals AI) or SciCode, where it leads.
- Shared results
- 72
- GPT-6 Astra only
- 49
- MiMo-V2.6-Pro only
- 1
- Like-for-like categories
- 8 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
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
GPT-6 Astra
GPT-6 Astra scores 85.1 against 65.4.
5 and 4 benchmarks behind the scores
Intelligence
AA Intelligence Index
GPT-6 Astra
GPT-6 Astra leads, 52.7 against 46.3.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only GPT-6 Astra has a AA Agentic Index result, 51.0.
Directional only
Web design
Design Arena: websites
GPT-6 Astra
GPT-6 Astra leads, 1336 against 1308.
Same board, both measured
General
Vals Index
GPT-6 Astra
GPT-6 Astra leads, 65.0% against 57.8%.
Same board, both measured
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
MiMo-V2.6-Pro
GPT-6 Astra $0.035, MiMo-V2.6-Pro $0.0009 per turn.
List prices
At a glance
- Coding index
- GPT-6 Astra 85.1 from 5 benchmarks, MiMo-V2.6-Pro 65.4 from 4 benchmarks.
- Widest category
- Agentic work, 18.4 points apart on average over 12 shared benchmarks.
- Widest single gap
- IOI (Vals AI): GPT-6 Astra 100.0% against MiMo-V2.6-Pro 39.3%, 60.7 points apart on a 0 to 100 scale.
- Output price
- GPT-6 Astra $50.00 against MiMo-V2.6-Pro $0.87 per million output tokens, 57.5x apart.
- Context window
- Both take 1.05M tokens.
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 | GPT-6 Astra | Bars | MiMo-V2.6-Pro | Ties |
|---|---|---|---|---|
| Coding | 13 | 4 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 7 | 5 | ||
| Reasoning | 5 | 3 | ||
| Math | 1 | 2 | ||
| Knowledge | 1 | 4 | ||
| Web design | 6 | 1 | ||
| General | 6 | 13 | ||
| All shared boards | 40 | 32 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index134
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| LiveBench coding | 93.7% | 81.5% | GPT-6 Astra |
| LMArena WebDev | 1774 | 1625 | GPT-6 Astra |
| AA Coding Index | 76.9 | Not measured | Only GPT-6 Astra measured |
| Terminal-Bench 4 (Vals AI) | 59.6% | 31.3% | GPT-6 Astra |
| Vibe Code Bench (Vals AI) | 89.6% | 85.2% | GPT-6 Astra |
| Code migration (Vals AI) | 67.7% | 43.0% | GPT-6 Astra |
| ProgramBench (Vals AI) | 5.5% | 0.5% | GPT-6 Astra |
| IOI (Vals AI) | 100.0% | 39.3% | GPT-6 Astra |
| Terminal-Bench 2.1 (Vals AI) | 87.3% | 67.8% | GPT-6 Astra |
| SWE-bench Multimodal (Vals AI) | 43.3% | 41.3% | GPT-6 Astra |
| Vibe Code Bench 1-100 (Vals AI) | 27.6% | Not measured | Only GPT-6 Astra measured |
| CyberBench (Vals AI) | 41.1% | 72.9% | MiMo-V2.6-Pro |
| SciCode | 56.5% | 60.9% | MiMo-V2.6-Pro |
| FrontierCode | 53.3% | Not measured | Only GPT-6 Astra measured |
| FrontierSWE | 65.5% | Not measured | Only GPT-6 Astra measured |
| GSO-Bench | 79.4% | Not measured | Only GPT-6 Astra measured |
| WeirdML | 93.3% | Not measured | Only GPT-6 Astra measured |
| MirrorCode | 46.7% | Not measured | Only GPT-6 Astra measured |
| ALE-Bench | 2951.3 | 1158.1 | GPT-6 Astra |
| LMArena Text: coding | 1489 | 1533 | MiMo-V2.6-Pro |
| LMArena Text: software and IT | 1474 | 1528 | MiMo-V2.6-Pro |
| LMArena WebDev: React | 1798 | 1639 | GPT-6 Astra |
| LMArena WebDev: HTML | 1775 | 1616 | GPT-6 Astra |
| LMArena WebDev: from an image | 1726 | 1598 | GPT-6 Astra |
| SciCode | 12.3% | Not measured | Only GPT-6 Astra measured |
| Neither model has a result on the other 14 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| AA Intelligence Index | 52.7 | 46.3 | GPT-6 Astra |
| Epoch Capabilities Index | 168.8 | Not measured | Only GPT-6 Astra measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index75
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| AA Agentic Index | 51.0 | Not measured | Only GPT-6 Astra measured |
| Design Arena: agents building web apps | 1373 | 1290 | GPT-6 Astra |
| Design Arena: agents building full-stack apps | 1357 | Not measured | Only GPT-6 Astra measured |
| Design Arena: agents building mobile apps | 1312 | Not measured | Only GPT-6 Astra measured |
| Design Arena: agents building Godot games | 1348 | Not measured | Only GPT-6 Astra measured |
| Design Arena: PowerPoint slides | 1219 | Not measured | Only GPT-6 Astra measured |
| Design Arena: spreadsheets | 1365 | Not measured | Only GPT-6 Astra measured |
| LiveBench research | 85.2% | 76.7% | GPT-6 Astra |
| LiveBench browser | 84.0% | 88.0% | MiMo-V2.6-Pro |
| LiveBench long agentic | 82.4% | 47.5% | GPT-6 Astra |
| SREBench (Vals AI) | 56.9% | 3.0% | GPT-6 Astra |
| Finance Agent (Vals AI) | 53.5% | 57.3% | MiMo-V2.6-Pro |
| Tax Agent Bench (Vals AI) | 20.7% | 32.4% | MiMo-V2.6-Pro |
| Legal Research Bench (Vals AI) | 39.4% | 47.1% | MiMo-V2.6-Pro |
| Harvey's Legal Agent Benchmark (Vals AI) | 7.1% | 13.8% | MiMo-V2.6-Pro |
| Excel Modeling Benchmark (Vals AI) | 71.7% | 62.9% | GPT-6 Astra |
| BioMysteryBench (Vals AI) | 79.3% | Not measured | Only GPT-6 Astra measured |
| Terminal-Bench-Science (Vals AI) | 62.9% | 2.9% | GPT-6 Astra |
| Vals Science Index | 65.1% | Not measured | Only GPT-6 Astra measured |
| Time Horizon Index (Vals AI) | 90.5% | Not measured | Only GPT-6 Astra measured |
| CUA-bench (Vals AI) | 19.2% | Not measured | Only GPT-6 Astra measured |
| Robo-bench (Vals AI) | 23.3% | Not measured | Only GPT-6 Astra measured |
| APEX-Agents | 64.7% | 54.4% | GPT-6 Astra |
| Remote Labor Index | 20.8% | Not measured | Only GPT-6 Astra measured |
| BALROG | 68.3% | Not measured | Only GPT-6 Astra measured |
| SpireClimb | 25.7% | Not measured | Only GPT-6 Astra measured |
| Vending-Bench 2 | $15,515 | Not measured | Only GPT-6 Astra measured |
| Neither model has a result on the other 14 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index53
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| LiveBench reasoning | 92.7% | 79.6% | GPT-6 Astra |
| MysteryMechanism (Vals AI) | 53.1% | 15.3% | GPT-6 Astra |
| GPQA Diamond (Artificial Analysis run) | 96.3% | Not measured | Only GPT-6 Astra measured |
| Humanity's Last Exam (Artificial Analysis run) | 54.7% | 49.4% | GPT-6 Astra |
| GPQA Diamond (Epoch AI run) | 95.8% | Not measured | Only GPT-6 Astra measured |
| ARC-AGI | 98.5% | Not measured | Only GPT-6 Astra measured |
| ARC-AGI-2 | 95.0% | Not measured | Only GPT-6 Astra measured |
| Chess puzzles | 74.0% | Not measured | Only GPT-6 Astra measured |
| Mystery game puzzles | 84.0% | Not measured | Only GPT-6 Astra measured |
| EBR-bench | 76.2% | Not measured | Only GPT-6 Astra measured |
| LMArena Text: hard prompts | 1463 | 1511 | MiMo-V2.6-Pro |
| LMArena Text: expert | 1489 | 1541 | MiMo-V2.6-Pro |
| LMArena Text: hard prompts in English | 1464 | 1520 | MiMo-V2.6-Pro |
| LMArena Vision: diagrams | 1297 | 1281 | GPT-6 Astra |
| LMArena Vision: homework | 1337 | 1264 | GPT-6 Astra |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index12
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| OTIS Mock AIME | 100.0% | Not measured | Only GPT-6 Astra measured |
| FrontierMath, tiers 1 to 3 | 93.7% | Not measured | Only GPT-6 Astra measured |
| FrontierMath, tier 4 | 97.6% | Not measured | Only GPT-6 Astra measured |
| ProofBench | 99.0% | 70.0% | GPT-6 Astra |
| LMArena Text: math | 1465 | 1500 | MiMo-V2.6-Pro |
| LMArena Text: mathematical work | 1484 | 1511 | MiMo-V2.6-Pro |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index14
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 48.5% | 45.0% | GPT-6 Astra |
| SimpleQA Verified | 75.6% | Not measured | Only GPT-6 Astra measured |
| LMArena Text: science | 1451 | 1506 | MiMo-V2.6-Pro |
| LMArena Text: medicine and healthcare | 1425 | 1497 | MiMo-V2.6-Pro |
| LMArena Text: legal and government | 1462 | 1485 | MiMo-V2.6-Pro |
| LMArena Text: business and finance | 1439 | 1468 | MiMo-V2.6-Pro |
| FACTS Benchmark Suite | 75.7% | Not measured | Only GPT-6 Astra measured |
| Neither model has a result on the other 11 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index61
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| Design Arena: websites | 1336 | 1308 | GPT-6 Astra |
| Design Arena: UI components | 1393 | 1340 | GPT-6 Astra |
| Design Arena: game dev | 1478 | 1314 | GPT-6 Astra |
| Design Arena: data viz | 1335 | 1336 | MiMo-V2.6-Pro |
| Design Arena: 3D | 1500 | 1330 | GPT-6 Astra |
| Design Arena: all code categories | 1379 | 1317 | GPT-6 Astra |
| Design Arena: SVG | 1431 | Not measured | Only GPT-6 Astra measured |
| Design Arena: ASCII art | 1353 | Not measured | Only GPT-6 Astra measured |
| LiveBench design | 82.0% | 78.5% | GPT-6 Astra |
GeneralLike-for-likePublic boards, shown as published, kept out of the index613
| Benchmark | GPT-6 Astra | MiMo-V2.6-Pro | Leader |
|---|---|---|---|
| Vals Index | 65.0% | 57.8% | GPT-6 Astra |
| LiveBench data analysis | 83.0% | 72.3% | GPT-6 Astra |
| Public Benefits Bench (Vals AI) | Not measured | 68.9% | Only MiMo-V2.6-Pro measured |
| SAGE (Vals AI) | 46.4% | 45.0% | GPT-6 Astra |
| MedScribe (Vals AI) | 87.9% | 88.3% | MiMo-V2.6-Pro |
| Long context reasoning (AA-LCR) | 80.7% | 86.3% | MiMo-V2.6-Pro |
| DTBench | 97.3% | Not measured | Only GPT-6 Astra measured |
| LMCA | 64.4% | Not measured | Only GPT-6 Astra measured |
| Furniture assembly | 80.0% | Not measured | Only GPT-6 Astra measured |
| LMArena Text | 1441 | 1491 | MiMo-V2.6-Pro |
| LMArena Text: instruction following | 1455 | 1491 | MiMo-V2.6-Pro |
| LMArena Text: creative writing | 1420 | 1466 | MiMo-V2.6-Pro |
| LMArena Vision | 1280 | 1263 | GPT-6 Astra |
| LMArena Text: English | 1447 | 1504 | MiMo-V2.6-Pro |
| LMArena Text: non-English | 1432 | 1474 | MiMo-V2.6-Pro |
| LMArena Text: Chinese | 1489 | 1529 | MiMo-V2.6-Pro |
| LMArena Text: German | 1459 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: Japanese | 1405 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: Korean | 1428 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: French | 1432 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: Spanish | 1422 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: Russian | 1438 | 1479 | MiMo-V2.6-Pro |
| LMArena Text: Polish | 1422 | Not measured | Only GPT-6 Astra measured |
| LMArena Text: multi-turn | 1447 | 1466 | MiMo-V2.6-Pro |
| LMArena Text: longer queries | 1460 | 1501 | MiMo-V2.6-Pro |
| LMArena Text: writing and language | 1437 | 1470 | MiMo-V2.6-Pro |
| LMArena Text: entertainment and media | 1427 | 1465 | MiMo-V2.6-Pro |
| LMArena Vision: English | 1280 | 1268 | GPT-6 Astra |
| LMArena Vision: Chinese | 1361 | Not measured | Only GPT-6 Astra measured |
| LMArena Vision: reading text | 1292 | 1270 | GPT-6 Astra |
| LMArena Vision: creative writing | 1286 | Not measured | Only GPT-6 Astra measured |
| 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 | GPT-6 Astra | MiMo-V2.6-Pro | 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
MiMo-V2.6-Pro costs less
Repository review
50K input + 3K output tokens
MiMo-V2.6-Pro costs less
Agent loop
200K input + 10K output tokens
MiMo-V2.6-Pro 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 | OpenAI GPT-6 Astra | Xiaomi MiMo-V2.6-Pro |
|---|---|---|
| Maker | OpenAI | Xiaomi |
| Weights | No public weights listed | Open weights |
| Released | September 4, 2026 | September 21, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $10.00 | $0.435 |
| Output $/Mtok | $50.00 | $0.87 |
| Coding index | 85.1 | 65.4 |
| Independent measurements behind it | 5 | 4 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is GPT-6 Astra better than MiMo-V2.6-Pro for coding?
Pick GPT-6 Astra for coding: it scores 85.1 on the Vibe Coding Index against 65.4 for MiMo-V2.6-Pro. Pick MiMo-V2.6-Pro for output tokens 57.5x cheaper ($0.87 vs $50.00 per million) and work measured by CyberBench (Vals AI) or SciCode, where it leads.
Which is cheaper, GPT-6 Astra or MiMo-V2.6-Pro?
GPT-6 Astra costs $10.00 per million input tokens and $50.00 per million output tokens; MiMo-V2.6-Pro costs $0.435 and $0.87. Cost per solved task is known for neither of them.
Which has the bigger context window, GPT-6 Astra or MiMo-V2.6-Pro?
Neither: both take 1.05M tokens.
How many benchmarks is the GPT-6 Astra vs MiMo-V2.6-Pro comparison based on?
72 benchmarks have a result for both models as of October 22, 2026. GPT-6 Astra's coding index rests on 5 independent benchmarks and MiMo-V2.6-Pro's on 4. Where only one model has a result, the page says so instead of naming a winner.