Claude Opus 4.6 vs GPT-6 Astra
Wins 0 of 8 areas
—
Wins 6 of 8 areas
Coding · Reasoning · Facts · Math · Long documents · Following instructions
GPT-6 Astra is the stronger all-rounder.Claude Opus 4.6 is cheaper.
Scores updated · 38 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 thinking07GPT-6 Astra7 of 7 tests
- CodingWriting and fixing software04GPT-6 Astra4 of 4 tests
- FactsGetting facts right instead of making them up04GPT-6 Astra4 of 4 tests
- MathCompetition and research-level math03GPT-6 Astra3 of 3 tests
- Long documentsFinding answers in very long texts01GPT-6 Astra1 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-6 Astra1 of 1 test
- AgentsCarrying out multi-step tasks on its own11Even1 each
- Images and chartsUnderstanding pictures, charts and video11Even1 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.
Claude Opus 4.6 costs 50% 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
- Solves new puzzle games it has never seenARC-AGI-3+99.4points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+70.8points ahead
- Short factual questions, answered correctlySimpleQA Verified+28.6points ahead
Where Claude Opus 4.6 pulls ahead
- Real work tasks from 44 professionsGDPVal+2.3points ahead
Every test, side by side
All 38 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 229 rating points15461775+229 rating
- LiveBench · Agentic CodingGPT-6 Astra by 8.34957.3+8.3
- SciCodeGPT-6 Astra by 4.651.956.5+4.6
- LiveBench · CodingGPT-6 Astra by 2.278.280.4+2.2
AgentsEven
- BrowseCompGPT-6 Astra by 7.58491.5+7.5
- GDPValClaude Opus 4.6 by 2.355.953.6+2.3
ReasoningGPT-6 Astra
- ARC-AGI-3GPT-6 Astra by 99.40.599.9+99.4
- ARC-AGI-2GPT-6 Astra by 26.268.895+26.2
- CritPtGPT-6 Astra by 19.112.631.7+19.1
- SimpleBenchGPT-6 Astra by 1667.683.6+16
- Humanity's Last ExamGPT-6 Astra by 14.839.954.7+14.8
- GPQA DiamondGPT-6 Astra by 6.589.696.1+6.5
- LiveBench · ReasoningGPT-6 Astra by 488.792.7+4
FactsGPT-6 Astra
- SimpleQA VerifiedGPT-6 Astra by 28.64775.6+28.6
- AA-Omniscience · AccuracyGPT-6 Astra by 15.64762.6+15.6
- AA-Omniscience · Non-hallucinationGPT-6 Astra by 11.537.248.7+11.5
- Vectara HHEM hallucination ratelower is betterGPT-6 Astra by 3.512.28.7+3.5
Images and chartsEven
- MMMU-ProGPT-6 Astra by 11.575.486.9+11.5
- LMArena · VisionClaude Opus 4.6 by 36 rating points13161280+36 rating
MathGPT-6 Astra
- FrontierMath Tier 4GPT-6 Astra by 70.826.897.6+70.8
- FrontierMath Tiers 1-3 (v2)GPT-6 Astra by 27.76693.7+27.7
- LiveBench · MathematicsGPT-6 Astra by 7.589.396.8+7.5
Following instructionsGPT-6 Astra
- LiveBench · Instruction FollowingGPT-6 Astra by 12.363.375.6+12.3
Other results14 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.
- ScreenSpot-Pro (No tools)GPT-6 Astra by 3557.792.7+35
- AA-OmniscienceGPT-6 Astra by 29.713.743.4+29.7
- Artificial Analysis Coding IndexGPT-6 Astra by 28.848.176.9+28.8
- HiL-Bench (Tools-allowed)GPT-6 Astra by 2738.365.3+27
- LVBenchGPT-6 Astra by 24.56387.5+24.5
- AA IntelligenceGPT-6 Astra by 20.831.952.7+20.8
- AA Agentic IndexClaude Opus 4.6 by 16.167.651.5+16.1
- livebench_data_analysisGPT-6 Astra by 13.169.983+13.1
- livebench_languageGPT-6 Astra by 6.183.389.4+6.1
- ARC-AGI-1GPT-6 Astra by 4.59397.5+4.5
- HLE (with tools)GPT-6 Astra by 3.953.357.2+3.9
- vectara_factual_consistencyGPT-6 Astra by 3.587.891.3+3.5
- vectara_avg_summary_lengthGPT-6 Astra by 10.9 rating points137.6148.5+10.9 rating
- vectara_answer_ratetie99.8100tie
Questions people ask
Which is better, Claude Opus 4.6 or GPT-6 Astra?
GPT-6 Astra wins six of the eight areas we test: coding, reasoning, facts, math, long documents and following instructions. Claude Opus 4.6 wins none, but costs 50% less. They are level on agents and images and charts.
Which is better for coding?
GPT-6 Astra. It wins 4 of the 4 coding tests both models report; Claude Opus 4.6 wins none.
Which is cheaper?
Claude Opus 4.6 costs $5.00 per million input tokens and $25.00 per million output tokens; GPT-6 Astra costs $10.00 and $50.00. That makes Claude Opus 4.6 about 50% cheaper for the same work.
How do you compare the two?
We use the 38 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 14 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.