AI Rankings
Claude Opus 4.6 vs GPT-6 Astra: Scores, Price and Which to Choose
Data updated
Read the model pages for the full picture: Claude Opus 4.6 and GPT-6 Astra.
Side by side
- Claude Opus 4.6
- GPT-6 Astra
- Epoch Capabilities IndexGPT-6 Astra leads
Combined score over many tests. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:155.7GPT-6 Astra:Better: 168.8 - Arena text ratingClaude Opus 4.6 leads
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:Better: 1503GPT-6 Astra:1477 - Arena coding ratingToo close to call
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:1547GPT-6 Astra:1543 - Arena web development ratingGPT-6 Astra leads
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:1546GPT-6 Astra:Better: 1774 - Arena vision ratingToo close to call
Rating from head-to-head votes by people. Bar shows where it sits between the lowest and highest score we track.
Claude Opus 4.6:1299GPT-6 Astra:1285 - Humanity's Last ExamGPT-6 Astra leads
A large set of very hard, expert-written questions across many subjects, built to stay difficult for top AI models.
Claude Opus 4.6:34.4%GPT-6 Astra:Better: 54.8% - ARC-AGI-2GPT-6 Astra leads
Visual puzzles where the AI must work out a new rule from a few examples and apply it.
Claude Opus 4.6:69.2%GPT-6 Astra:Better: 95.0% - FrontierMath (Tiers 1-3)GPT-6 Astra leads
Original, very hard maths problems written by mathematicians.
Claude Opus 4.6:66.0%GPT-6 Astra:Better: 93.7% - GPQA DiamondGPT-6 Astra leads
Very hard multiple-choice science questions in biology, physics and chemistry, written by experts and designed so a quick web search does not give the answer.
Claude Opus 4.6:90.5%GPT-6 Astra:Better: 95.8% - OTIS Mock AIMEGPT-6 Astra leads
Maths competition problems in the style of the US AIME exam, from the 2024 and 2025 sets.
Claude Opus 4.6:94.4%GPT-6 Astra:Better: 100.0% - SimpleQA VerifiedGPT-6 Astra leads
Short factual questions that each have one correct answer.
Claude Opus 4.6:47.0%GPT-6 Astra:Better: 75.6% - Blended price per million tokensClaude Opus 4.6 costs less
Blended price: lower is better.
Claude Opus 4.6:Better: $10.00GPT-6 Astra:$20.00 - Context windowToo close to call
How much text it can read at once.
Claude Opus 4.6:1M tokensGPT-6 Astra:922K tokens
The numbers
| Measure | Claude Opus 4.6 | GPT-6 Astra |
|---|---|---|
| Epoch Capabilities Index | 155.7 | 168.8 |
| Arena text rating | 1503 | 1477 |
| Arena coding ratingToo close to call | 1547 | 1543 |
| Arena web development rating | 1546 | 1774 |
| Arena vision ratingToo close to call | 1299 | 1285 |
| Humanity's Last Exam | 34.4% | 54.8% |
| ARC-AGI-2 | 69.2% | 95.0% |
| FrontierMath (Tiers 1-3) | 66.0% | 93.7% |
| GPQA Diamond | 90.5% | 95.8% |
| OTIS Mock AIME | 94.4% | 100.0% |
| SimpleQA Verified | 47.0% | 75.6% |
| Blended price per million tokens | $10.00 | $20.00 |
| Context windowToo close to call | 1M tokens | 922K tokens |
What it costs in everyday terms
- 100 chats with Claude Opus 4.6
- $1.75
- Blended price $10.00 per million tokens.
- 100 chats with GPT-6 Astra
- $3.50
- Blended price $20.00 per million tokens.
Who should pick which
Pick Claude Opus 4.6 if these matter most
- Arena text rating: 1503 against 1477
- Blended price per million tokens: $10.00 against $20.00
Pick GPT-6 Astra if these matter most
- Epoch Capabilities Index: 168.8 against 155.7
- Arena web development rating: 1774 against 1546
- Humanity's Last Exam: 54.8% against 34.4%
- ARC-AGI-2: 95.0% against 69.2%
- FrontierMath (Tiers 1-3): 93.7% against 66.0%
- GPQA Diamond: 95.8% against 90.5%
- OTIS Mock AIME: 100.0% against 94.4%
- SimpleQA Verified: 75.6% against 47.0%
Too close to call: Arena coding rating, Arena vision rating, Context window.
Scores come from tests and votes, not from your own work. Try both on a task you care about before you commit.
Questions about this comparison
- Which is better, Claude Opus 4.6 or GPT-6 Astra?
- GPT-6 Astra scores higher on 8 of 11 shared quality measures, Claude Opus 4.6 on 1. 2 measures are too close to call. Claude Opus 4.6 costs about 50% less than GPT-6 Astra on a blended price of $10.00 against $20.00 per million tokens. Which one is better for you depends on your task and budget, so test both on your own work.
- Which is cheaper, Claude Opus 4.6 or GPT-6 Astra?
- Claude Opus 4.6 is cheaper on blended price: $10.00 per million tokens for Claude Opus 4.6 against $20.00 for GPT-6 Astra. For 100 chats of about 1,000 tokens in and 500 tokens back, that is about $1.75 for Claude Opus 4.6 and $3.50 for GPT-6 Astra.
- Which is better for coding, Claude Opus 4.6 or GPT-6 Astra?
- On Arena coding rating they are too close to call (1547 and 1543).
Where this data comes from
- Epoch AI: Benchmark data: Epoch AI, 'Capabilities & benchmarking', epoch.ai/benchmarks (CC BY 4.0). We match models across sources, rank them and show them in charts. Scores are not changed. Epoch AI does not endorse this site.
- Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
- LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.
Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake