GPT-6 Astra vs GPT-6 Sol
Wins 6 of 8 areas
Agents · Reasoning · Facts · Images and charts · Math · Following instructions
Wins 1 of 8 areas
Long documents
GPT-6 Astra is the stronger all-rounder.GPT-6 Sol is cheaper and better at long documents.
Both rank among the ten best models we track in math.
Scores updated · 42 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 thinking50GPT-6 Astra5 of 6 tests · 1 tie
- FactsGetting facts right instead of making them up31GPT-6 Astra3 of 4 tests
- AgentsCarrying out multi-step tasks on its own20GPT-6 Astra2 of 3 tests · 1 tie
- MathCompetition and research-level math20GPT-6 Astra2 of 3 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video20GPT-6 Astra2 of 2 tests
- Following instructionsDoing exactly what it is asked10GPT-6 Astra1 of 1 test
- Long documentsFinding answers in very long texts01GPT-6 Sol1 of 1 test
- CodingWriting and fixing software22Even2 each
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-6 Sol costs 80% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-6 Astra pulls ahead
- Solves new puzzle games it has never seenARC-AGI-3+95.3points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+15.2points ahead
- Short factual questions, answered correctlySimpleQA Verified+14.9points ahead
Where GPT-6 Sol pulls ahead
- Reasons across sets of long documentsAA-LCR+3points ahead
- Programming problems, refreshed regularlyLiveBench · Coding+1.4points ahead
- Code for real scientific research problemsSciCode+1.1points ahead
Every test, side by side
All 42 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingEven
- LMArena · WebDevGPT-6 Astra by 91 rating points17641673+91 rating
- LiveBench · Agentic CodingGPT-6 Astra by 4.457.352.9+4.4
- LiveBench · CodingGPT-6 Sol by 1.480.481.8+1.4
- SciCodeGPT-6 Sol by 1.156.557.6+1.1
AgentsGPT-6 Astra
- Terminal-Bench 4.0GPT-6 Astra by 15.259.143.9+15.2
- GDPValGPT-6 Astra by 3.253.650.4+3.2
- AA IT-Bench SREtie48.649.4tie
ReasoningGPT-6 Astra
- ARC-AGI-3GPT-6 Astra by 95.399.94.6+95.3
- SimpleBenchGPT-6 Astra by 10.583.673.1+10.5
- Humanity's Last ExamGPT-6 Astra by 6.854.747.9+6.8
- ARC-AGI-2GPT-6 Astra by 5.49589.6+5.4
- LiveBench · ReasoningGPT-6 Astra by 492.788.7+4
- CritPttie31.730.9tie
FactsGPT-6 Astra
- SimpleQA VerifiedGPT-6 Astra by 14.975.660.7+14.9
- AA-Omniscience · Non-hallucinationGPT-6 Astra by 8.848.739.9+8.8
- AA-Omniscience · AccuracyGPT-6 Astra by 8.162.654.5+8.1
- Vectara HHEM hallucination ratelower is betterGPT-6 Sol by 2.28.76.5+2.2
Images and chartsGPT-6 Astra
- LMArena · VisionGPT-6 Astra by 46 rating points12791233+46 rating
- MMMU-ProGPT-6 Astra by 486.982.9+4
MathGPT-6 Astra
- FrontierMath Tier 4GPT-6 Astra by 7.697.690+7.6
- FrontierMath Tiers 1-3 (v2)GPT-6 Astra by 3.993.789.8+3.9
- LiveBench · Mathematicstie96.896.4tie
Following instructionsGPT-6 Astra
- LiveBench · Instruction FollowingGPT-6 Astra by 775.668.6+7
Other results18 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.
- Terminal-Bench-Science 0.1GPT-6 Astra by 35.763.327.6+35.7
- AA-OmniscienceGPT-6 Astra by 16.343.427.1+16.3
- Terminal-Bench 4.0GPT-6 Astra by 8.357.749.4+8.3
- OSWorld 2.0GPT-6 Astra by 8.272.664.4+8.2
- vectara_avg_summary_lengthGPT-6 Astra by 77.1 rating points148.571.4+77.1 rating
- HealthBench Hard length-adjustedGPT-6 Astra by 6.536.630.1+6.5
- GDPval-AA 2.1GPT-6 Astra by 55 rating points15421487+55 rating
- DeepSWE 1.1GPT-6 Astra by 5.374.168.8+5.3
- AA IntelligenceGPT-6 Astra by 5.152.747.6+5.1
- HealthBench length-adjustedGPT-6 Astra by 5.158.353.2+5.1
- livebench_languageGPT-6 Astra by 4.189.485.3+4.1
- HealthBench Professional length-adjustedGPT-6 Astra by 3.964.760.8+3.9
- Agents' Last ExamGPT-6 Astra by 2.959.356.4+2.9
- vectara_factual_consistencyGPT-6 Sol by 2.291.393.5+2.2
- ARC-AGI-1GPT-6 Astra by 297.595.5+2
- livebench_data_analysisGPT-6 Astra by 1.88381.2+1.8
- HealthBench Consensus length-adjustedtie95.596.2tie
- vectara_answer_ratetie100100tie
Questions people ask
Which is better, GPT-6 Astra or GPT-6 Sol?
GPT-6 Astra wins six of the eight areas we test: agents, reasoning, facts, images and charts, math and following instructions. GPT-6 Sol wins long documents, and costs 80% less. They are level on coding.
Which is better for coding?
Neither. They win 2 coding tests each of the 4 both models report.
Which is cheaper?
GPT-6 Astra costs $10.00 per million input tokens and $50.00 per million output tokens; GPT-6 Sol costs $2.00 and $10.00. That makes GPT-6 Sol about 80% cheaper for the same work.
How do you compare the two?
We use the 42 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 18 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.