GPT-5.2 vs GPT-6 Astra
Wins 1 of 8 areas
Long documents
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Following instructions
GPT-6 Astra is the stronger all-rounder.GPT-5.2 is cheaper and better at long documents.
Scores updated · 40 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking06GPT-6 Astra6 of 6 tests
- CodingWriting and fixing software04GPT-6 Astra4 of 4 tests
- FactsGetting facts right instead of making them up04GPT-6 Astra4 of 4 tests
- AgentsCarrying out multi-step tasks on its own03GPT-6 Astra3 of 3 tests
- MathCompetition and research-level math03GPT-6 Astra3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video02GPT-6 Astra2 of 2 tests
- Following instructionsDoing exactly what it is asked01GPT-6 Astra1 of 1 test
- Long documentsFinding answers in very long texts10GPT-5.21 of 1 test
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
GPT-5.2 costs 74% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where GPT-6 Astra pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+65.9points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+42.1points ahead
- Short factual questions, answered correctlySimpleQA Verified+38.5points ahead
Where GPT-5.2 pulls ahead
- Reasons across sets of long documentsAA-LCR+2points ahead
Every test, side by side
All 40 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-6 Astra
- LMArena · WebDevGPT-6 Astra by 358 rating points14171775+358 rating
- LiveBench · Agentic CodingGPT-6 Astra by 750.357.3+7
- SciCodeGPT-6 Astra by 4.452.156.5+4.4
- LiveBench · CodingGPT-6 Astra by 4.376.180.4+4.3
AgentsGPT-6 Astra
- τ-Bench V3 · BankingGPT-6 Astra by 30.311.141.4+30.3
- BrowseCompGPT-6 Astra by 25.765.891.5+25.7
- GDPValGPT-6 Astra by 5.348.353.6+5.3
ReasoningGPT-6 Astra
- ARC-AGI-2GPT-6 Astra by 42.152.995+42.1
- SimpleBenchGPT-6 Astra by 37.845.883.6+37.8
- CritPtGPT-6 Astra by 20.111.631.7+20.1
- Humanity's Last ExamGPT-6 Astra by 1737.754.7+17
- LiveBench · ReasoningGPT-6 Astra by 9.583.292.7+9.5
- GPQA DiamondGPT-6 Astra by 5.890.396.1+5.8
FactsGPT-6 Astra
- SimpleQA VerifiedGPT-6 Astra by 38.537.175.6+38.5
- AA-Omniscience · Non-hallucinationGPT-6 Astra by 29.918.848.7+29.9
- AA-Omniscience · AccuracyGPT-6 Astra by 18.344.362.6+18.3
- Vectara HHEM hallucination ratelower is betterGPT-6 Astra by 2.110.88.7+2.1
Images and chartsGPT-6 Astra
- MMMU-ProGPT-6 Astra by 12.374.686.9+12.3
- LMArena · VisionGPT-6 Astra by 34 rating points12461280+34 rating
MathGPT-6 Astra
- FrontierMath Tier 4GPT-6 Astra by 65.931.797.6+65.9
- FrontierMath Tiers 1-3 (v2)GPT-6 Astra by 26.367.493.7+26.3
- LiveBench · MathematicsGPT-6 Astra by 3.693.296.8+3.6
Following instructionsGPT-6 Astra
- LiveBench · Instruction FollowingGPT-6 Astra by 13.861.875.6+13.8
Other results16 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA-OmniscienceGPT-6 Astra by 44.3-0.943.4+44.3
- Artificial Analysis Coding IndexGPT-6 Astra by 28.248.776.9+28.2
- AA IntelligenceGPT-6 Astra by 22.330.452.7+22.3
- HealthBench Professional length-adjustedGPT-6 Astra by 18.845.964.7+18.8
- HLE (with tools)GPT-6 Astra by 11.745.557.2+11.7
- ARC-AGI-1GPT-6 Astra by 11.386.297.5+11.3
- livebench_languageGPT-6 Astra by 9.679.889.4+9.6
- AA Agentic IndexGPT-5.2 by 8.760.251.5+8.7
- ScreenSpot-Pro (No tools)GPT-6 Astra by 6.486.392.7+6.4
- livebench_data_analysisGPT-6 Astra by 4.878.283+4.8
- vectara_avg_summary_lengthGPT-5.2 by 37.8 rating points186.3148.5+37.8 rating
- HealthBench Hard length-adjustedGPT-6 Astra by 2.334.336.6+2.3
- vectara_factual_consistencyGPT-6 Astra by 2.189.291.3+2.1
- HealthBench length-adjustedGPT-6 Astra by 1.556.858.3+1.5
- HealthBench Consensus length-adjustedGPT-6 Astra by 1.194.495.5+1.1
- vectara_answer_ratetie100100tie
Questions people ask
Which is better, GPT-5.2 or GPT-6 Astra?
GPT-6 Astra wins seven of the eight areas we test: coding, agents, reasoning, facts, images and charts, math and following instructions. GPT-5.2 wins long documents, and costs 74% less.
Which is better for coding?
GPT-6 Astra. It wins 4 of the 4 coding tests both models report; GPT-5.2 wins none.
Which is cheaper?
GPT-5.2 costs $1.75 per million input tokens and $14.00 per million output tokens; GPT-6 Astra costs $10.00 and $50.00. That makes GPT-5.2 about 74% cheaper for the same work.
How do you compare the two?
We use the 40 benchmark tests both models have published scores on. The verdict counts the 24 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 16 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.