GPT-4 Turbo vs GPT-6 Astra
GPT-6 Astra leads GPT-4 Turbo on the Artificial Analysis Intelligence Index, 52.7 to 7.0, and GPT-4 Turbo costs 1.7x less per output token ($30.00 vs $50.00 per million). Updated October 22, 2026; 37 benchmarks have a result for both.
vs boards won of 37 shared
GPT-4 Turbo or GPT-6 Astra: which to pick
Only GPT-6 Astra has a coding score, 85.1 on the Vibe Coding Index; GPT-4 Turbo has none, so the two cannot be ranked on coding.
Pick GPT-4 Turbo for output tokens 1.7x cheaper ($30.00 vs $50.00 per million).
Model AGPT-4 TurboOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BGPT-6 AstraOpenAI85.1/1005 independent benchmarksNo cost per solved task
- Shared results
- 37
- GPT-4 Turbo only
- 5
- GPT-6 Astra only
- 92
- Like-for-like categories
- 6 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
No call
Only GPT-6 Astra has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
GPT-6 Astra
GPT-6 Astra leads, 52.7 against 7.0.
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
No call
Only GPT-6 Astra has a Design Arena: websites result, 1336.
Directional only
General
Vals Index
No call
Only GPT-6 Astra has a Vals Index result, 65.0%.
Directional only
Long documents
Listed context window
GPT-6 Astra
GPT-6 Astra takes 1.05M tokens against 128K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GPT-4 Turbo
GPT-4 Turbo $0.025, GPT-6 Astra $0.035 per turn.
List prices
At a glance
- Coding index
- GPT-4 Turbo not benchmarked, GPT-6 Astra 85.1 from 5 benchmarks.
- Widest category
- Intelligence, 48.8 points apart on average over 2 shared benchmarks.
- Widest single gap
- AA Coding Index: GPT-4 Turbo 21.5 against GPT-6 Astra 76.9, 55.4 points apart on a 0 to 100 scale.
- Output price
- GPT-4 Turbo $30.00 against GPT-6 Astra $50.00 per million output tokens, 1.7x apart.
- Context window
- GPT-4 Turbo takes 128K tokens, GPT-6 Astra 1.05M.
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-4 Turbo | Bars | GPT-6 Astra | Ties |
|---|---|---|---|---|
| Coding | 0 | 3 | ||
| Intelligence | 0 | 2 | ||
| Reasoning | 0 | 4 | ||
| Math | 0 | 2 | ||
| Knowledge | 0 | 4 | ||
| General | 0 | 22 | ||
| All shared boards | 0 | 37 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 93.7% | Only GPT-6 Astra measured |
| LMArena WebDev | Not measured | 1774 | Only GPT-6 Astra measured |
| AA Coding Index | 21.5 | 76.9 | GPT-6 Astra |
| Terminal-Bench 4 (Vals AI) | Not measured | 59.6% | Only GPT-6 Astra measured |
| Vibe Code Bench (Vals AI) | Not measured | 89.6% | Only GPT-6 Astra measured |
| Code migration (Vals AI) | Not measured | 67.7% | Only GPT-6 Astra measured |
| ProgramBench (Vals AI) | Not measured | 5.5% | Only GPT-6 Astra measured |
| IOI (Vals AI) | Not measured | 100.0% | Only GPT-6 Astra measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 87.3% | Only GPT-6 Astra measured |
| SWE-bench Multimodal (Vals AI) | Not measured | 43.3% | Only GPT-6 Astra measured |
| Vibe Code Bench 1-100 (Vals AI) | Not measured | 27.6% | Only GPT-6 Astra measured |
| CyberBench (Vals AI) | Not measured | 41.1% | Only GPT-6 Astra measured |
| LiveCodeBench (Artificial Analysis run) | 29.1% | Not measured | Only GPT-4 Turbo measured |
| SciCode | Not measured | 56.5% | Only GPT-6 Astra measured |
| FrontierCode | Not measured | 53.3% | Only GPT-6 Astra measured |
| FrontierSWE | Not measured | 65.5% | Only GPT-6 Astra measured |
| GSO-Bench | Not measured | 79.4% | Only GPT-6 Astra measured |
| WeirdML | Not measured | 93.3% | Only GPT-6 Astra measured |
| MirrorCode | Not measured | 46.7% | Only GPT-6 Astra measured |
| ALE-Bench | Not measured | 2951.3 | Only GPT-6 Astra measured |
| LMArena Text: coding | 1268 | 1489 | GPT-6 Astra |
| LMArena Text: software and IT | 1267 | 1474 | GPT-6 Astra |
| LMArena WebDev: React | Not measured | 1798 | Only GPT-6 Astra measured |
| LMArena WebDev: HTML | Not measured | 1775 | Only GPT-6 Astra measured |
| LMArena WebDev: from an image | Not measured | 1726 | Only GPT-6 Astra measured |
| SciCode | Not measured | 12.3% | Only GPT-6 Astra measured |
| SWE-Bench Pro V2 | Not measured | 96.9% | Only GPT-6 Astra measured |
| SWE Atlas: Codebase QnA | Not measured | 59.1% | Only GPT-6 Astra measured |
| SWE Atlas: Refactoring | Not measured | 59.1% | Only GPT-6 Astra measured |
| SWE Atlas: Test Writing | Not measured | 50.7% | Only GPT-6 Astra measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| AA Intelligence Index | 7.0 | 52.7 | GPT-6 Astra |
| Epoch Capabilities Index | 127.3 | 168.8 | GPT-6 Astra |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index27 boards, none shared
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 51.0 | Only GPT-6 Astra measured |
| Design Arena: agents building web apps | Not measured | 1374 | Only GPT-6 Astra measured |
| Design Arena: agents building full-stack apps | Not measured | 1357 | Only GPT-6 Astra measured |
| Design Arena: agents building mobile apps | Not measured | 1312 | Only GPT-6 Astra measured |
| Design Arena: agents building Godot games | Not measured | 1348 | Only GPT-6 Astra measured |
| Design Arena: PowerPoint slides | Not measured | 1217 | Only GPT-6 Astra measured |
| Design Arena: spreadsheets | Not measured | 1378 | Only GPT-6 Astra measured |
| LiveBench research | Not measured | 85.2% | Only GPT-6 Astra measured |
| LiveBench browser | Not measured | 84.0% | Only GPT-6 Astra measured |
| LiveBench long agentic | Not measured | 82.4% | Only GPT-6 Astra measured |
| SREBench (Vals AI) | Not measured | 56.9% | Only GPT-6 Astra measured |
| Finance Agent (Vals AI) | Not measured | 53.5% | Only GPT-6 Astra measured |
| Tax Agent Bench (Vals AI) | Not measured | 20.7% | Only GPT-6 Astra measured |
| Legal Research Bench (Vals AI) | Not measured | 39.4% | Only GPT-6 Astra measured |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 7.1% | Only GPT-6 Astra measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 71.7% | Only GPT-6 Astra measured |
| BioMysteryBench (Vals AI) | Not measured | 79.3% | Only GPT-6 Astra measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 62.9% | Only GPT-6 Astra measured |
| Vals Science Index | Not measured | 65.1% | Only GPT-6 Astra measured |
| Time Horizon Index (Vals AI) | Not measured | 90.5% | Only GPT-6 Astra measured |
| CUA-bench (Vals AI) | Not measured | 19.2% | Only GPT-6 Astra measured |
| Robo-bench (Vals AI) | Not measured | 23.3% | Only GPT-6 Astra measured |
| APEX-Agents | Not measured | 64.7% | Only GPT-6 Astra measured |
| Remote Labor Index | Not measured | 20.8% | Only GPT-6 Astra measured |
| BALROG | Not measured | 68.3% | Only GPT-6 Astra measured |
| SpireClimb | Not measured | 25.7% | Only GPT-6 Astra measured |
| Vending-Bench 2 | Not measured | $15,515 | Only GPT-6 Astra measured |
| Neither model has a result on the other 15 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| LiveBench reasoning | Not measured | 92.7% | Only GPT-6 Astra measured |
| MysteryMechanism (Vals AI) | Not measured | 53.1% | Only GPT-6 Astra measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 96.3% | Only GPT-6 Astra measured |
| Humanity's Last Exam (Artificial Analysis run) | 3.1% | 54.7% | GPT-6 Astra |
| GPQA Diamond (Epoch AI run) | Not measured | 95.8% | Only GPT-6 Astra measured |
| ARC-AGI | Not measured | 98.5% | Only GPT-6 Astra measured |
| ARC-AGI-2 | Not measured | 95.0% | Only GPT-6 Astra measured |
| Chess puzzles | Not measured | 74.0% | Only GPT-6 Astra measured |
| Mystery game puzzles | Not measured | 84.0% | Only GPT-6 Astra measured |
| EBR-bench | Not measured | 76.2% | Only GPT-6 Astra measured |
| LMArena Text: hard prompts | 1251 | 1463 | GPT-6 Astra |
| LMArena Text: expert | 1223 | 1489 | GPT-6 Astra |
| LMArena Text: hard prompts in English | 1266 | 1464 | GPT-6 Astra |
| LMArena Vision: diagrams | Not measured | 1297 | Only GPT-6 Astra measured |
| LMArena Vision: homework | Not measured | 1337 | Only GPT-6 Astra measured |
| Humanity's Last Exam (Scale run) | Not measured | 60.6% | Only GPT-6 Astra measured |
| Neither model has a result on the other 7 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| OTIS Mock AIME | Not measured | 100.0% | Only GPT-6 Astra measured |
| FrontierMath, tiers 1 to 3 | Not measured | 93.7% | Only GPT-6 Astra measured |
| FrontierMath, tier 4 | Not measured | 97.6% | Only GPT-6 Astra measured |
| ProofBench | Not measured | 99.0% | Only GPT-6 Astra measured |
| LMArena Text: math | 1272 | 1465 | GPT-6 Astra |
| LMArena Text: mathematical work | 1268 | 1484 | GPT-6 Astra |
| MathArena | Not measured | 81.9% | Only GPT-6 Astra measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| LegalBench (Vals AI) | 80.5% | Not measured | Only GPT-4 Turbo measured |
| MedQA (Vals AI) | 82.0% | Not measured | Only GPT-4 Turbo measured |
| MedCode (Vals AI) | Not measured | 48.5% | Only GPT-6 Astra measured |
| MMLU Pro (Artificial Analysis run) | 69.4% | Not measured | Only GPT-4 Turbo measured |
| SimpleQA Verified | Not measured | 75.6% | Only GPT-6 Astra measured |
| MMLU | 81.3% | Not measured | Only GPT-4 Turbo measured |
| LMArena Text: science | 1256 | 1451 | GPT-6 Astra |
| LMArena Text: medicine and healthcare | 1239 | 1425 | GPT-6 Astra |
| LMArena Text: legal and government | 1265 | 1462 | GPT-6 Astra |
| LMArena Text: business and finance | 1222 | 1439 | GPT-6 Astra |
| FACTS Benchmark Suite | Not measured | 75.7% | Only GPT-6 Astra measured |
| PRBench Finance | Not measured | 47.5% | Only GPT-6 Astra measured |
| PRBench Legal | Not measured | 48.4% | Only GPT-6 Astra measured |
| Neither model has a result on the other 7 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| Design Arena: websites | Not measured | 1336 | Only GPT-6 Astra measured |
| Design Arena: UI components | Not measured | 1394 | Only GPT-6 Astra measured |
| Design Arena: game dev | Not measured | 1480 | Only GPT-6 Astra measured |
| Design Arena: data viz | Not measured | 1334 | Only GPT-6 Astra measured |
| Design Arena: 3D | Not measured | 1500 | Only GPT-6 Astra measured |
| Design Arena: all code categories | Not measured | 1379 | Only GPT-6 Astra measured |
| Design Arena: SVG | Not measured | 1430 | Only GPT-6 Astra measured |
| Design Arena: ASCII art | Not measured | 1353 | Only GPT-6 Astra measured |
| LiveBench design | Not measured | 82.0% | Only GPT-6 Astra measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index022
| Benchmark | GPT-4 Turbo | GPT-6 Astra | Leader |
|---|---|---|---|
| Vals Index | Not measured | 65.0% | Only GPT-6 Astra measured |
| LiveBench data analysis | Not measured | 83.0% | Only GPT-6 Astra measured |
| SAGE (Vals AI) | Not measured | 46.4% | Only GPT-6 Astra measured |
| MedScribe (Vals AI) | Not measured | 87.9% | Only GPT-6 Astra measured |
| Long context reasoning (AA-LCR) | Not measured | 80.7% | Only GPT-6 Astra measured |
| DTBench | 61.6% | 97.3% | GPT-6 Astra |
| LMCA | 9.8% | 64.4% | GPT-6 Astra |
| Furniture assembly | Not measured | 80.0% | Only GPT-6 Astra measured |
| LMArena Text | 1272 | 1441 | GPT-6 Astra |
| LMArena Text: instruction following | 1249 | 1455 | GPT-6 Astra |
| LMArena Text: creative writing | 1268 | 1420 | GPT-6 Astra |
| LMArena Vision | 1090 | 1280 | GPT-6 Astra |
| LMArena Text: English | 1291 | 1447 | GPT-6 Astra |
| LMArena Text: non-English | 1245 | 1432 | GPT-6 Astra |
| LMArena Text: Chinese | 1242 | 1489 | GPT-6 Astra |
| LMArena Text: German | 1259 | 1459 | GPT-6 Astra |
| LMArena Text: Japanese | 1194 | 1405 | GPT-6 Astra |
| LMArena Text: Korean | 1187 | 1428 | GPT-6 Astra |
| LMArena Text: French | 1276 | 1432 | GPT-6 Astra |
| LMArena Text: Spanish | 1260 | 1422 | GPT-6 Astra |
| LMArena Text: Russian | 1259 | 1438 | GPT-6 Astra |
| LMArena Text: Polish | 1302 | 1422 | GPT-6 Astra |
| LMArena Text: multi-turn | 1267 | 1447 | GPT-6 Astra |
| LMArena Text: longer queries | 1254 | 1460 | GPT-6 Astra |
| LMArena Text: writing and language | 1279 | 1437 | GPT-6 Astra |
| LMArena Text: entertainment and media | 1258 | 1427 | GPT-6 Astra |
| LMArena Vision: English | 1097 | 1280 | GPT-6 Astra |
| LMArena Vision: Chinese | 1045 | 1361 | GPT-6 Astra |
| LMArena Vision: reading text | Not measured | 1292 | Only GPT-6 Astra measured |
| LMArena Vision: creative writing | Not measured | 1286 | Only GPT-6 Astra measured |
| Neither model has a result on the other 18 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | GPT-4 Turbo | GPT-6 Astra | 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
GPT-4 Turbo$0.025Fits in one request
GPT-6 Astra$0.035Fits in one request
GPT-4 Turbo costs less
Repository review
50K input + 3K output tokens
GPT-4 Turbo$0.590Fits in one request
GPT-6 Astra$0.650Fits in one request
GPT-4 Turbo costs less
Agent loop
200K input + 10K output tokens
GPT-4 Turbo$2.30Exceeds the context window
GPT-6 Astra$2.50Fits in one request
GPT-4 Turbo 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-4 Turbo | OpenAI GPT-6 Astra |
|---|---|---|
| Maker | OpenAI | OpenAI |
| Weights | No public weights listed | No public weights listed |
| Released | April 9, 2024 | September 4, 2026 |
| Context window | 128K | 1.05M |
| Input $/Mtok | $10.00 | $10.00 |
| Output $/Mtok | $30.00 | $50.00 |
| Coding index | Not benchmarked | 85.1 |
| Independent measurements behind it | 0 | 5 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is GPT-4 Turbo better than GPT-6 Astra for coding?
Only GPT-6 Astra has a coding score, 85.1 on the Vibe Coding Index; GPT-4 Turbo has none, so the two cannot be ranked on coding. Pick GPT-4 Turbo for output tokens 1.7x cheaper ($30.00 vs $50.00 per million).
Which is cheaper, GPT-4 Turbo or GPT-6 Astra?
GPT-4 Turbo costs $10.00 per million input tokens and $30.00 per million output tokens; GPT-6 Astra costs $10.00 and $50.00. Cost per solved task is known for neither of them.
Which has the bigger context window, GPT-4 Turbo or GPT-6 Astra?
GPT-6 Astra, with 1.05M tokens against 128K.
How many benchmarks is the GPT-4 Turbo vs GPT-6 Astra comparison based on?
37 benchmarks have a result for both models as of October 22, 2026. GPT-4 Turbo's coding index rests on 0 independent benchmarks and GPT-6 Astra's on 5. Where only one model has a result, the page says so instead of naming a winner.