Which is better: Claude Sonnet 5.5 or GPT-6 Astra?

Verdict: Claude Sonnet 5.5 ranks higher (#6 vs #7) and wins 4 of 6 shared benchmarks; Claude Sonnet 5.5 costs less ($2.00/$10.0 vs $10.0/$50.0 per 1M tokens). AskClash compares Claude Sonnet 5.5 and GPT-6 Astra side by side across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, AskClash ACB, and context window so you can see which model wins on each benchmark.

How do Claude Sonnet 5.5 and GPT-6 Astra compare on coding benchmarks?

The comparison table shows SWE-bench, SWE-Pro, SWE-Atlas, Terminal-Bench, DeepSWE, and coding agent index scores for both Claude Sonnet 5.5 and GPT-6 Astra when publicly disclosed.

LLM Comparison

Claude Sonnet 5.5 vs GPT-6 Astra: benchmark scores, pricing & comparison.

Side-by-side Claude Sonnet 5.5 vs GPT-6 Astra comparison across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, context window, and AskClash RWT. Green marks the winner on each benchmark.

Verdict: Claude Sonnet 5.5 ranks higher (#6 vs #7) and wins 4 of 6 shared benchmarks; Claude Sonnet 5.5 costs less ($2.00/$10.0 vs $10.0/$50.0 per 1M tokens).

Open live leaderboard Claude Sonnet 5.5 model page GPT-6 Astra model page

Rank #6 vs #7AskClash overall scores 73.3 vs 72.1.

Pricing $2.00/$10.0 vs $10.0/$50.0Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryAnthropic vs OpenAI.

Claude Sonnet 5.5 vs GPT-6 Astra benchmark comparison

Green cells highlight the winning model for each metric. Scores are cached from the AskClash LLM leaderboard snapshot.

Metric	Claude Sonnet 5.5	GPT-6 Astra
Overall Score	73.3	72.1
Leaderboard Rank	#6	#7
ACB	75.3	64.5
RWT	—	9.5
Coding Agent Index	—	67.0
HLE	64.5	57.2
GPQA	—	96.0
SWE-Pro	81.3	—
SWE-Atlas	—	61.8
Terminal-Bench	83.2	88.4
DeepSWE	71.0	73.2
GDPval-AA	1844.2	1629.3
Finance Agent	58.1	53.5
MMMU-Pro	—	87.0
ARC-AGI 2	—	95.0
MRCR	—	100.0
Input Price (per 1M tokens)	$2.00	$10.0
Output Price (per 1M tokens)	$10.0	$50.0
Context Window	1M	1.05M
Benchmarks Published	10	14

Claude Sonnet 5.5 vs GPT-6 Astra head-to-head charts

Claude Sonnet 5.5 leads 5 and GPT-6 Astra leads 2 of 7 shared benchmarks. Claude Sonnet 5.5 is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

Claude Sonnet 5.5GPT-6 Astra

Overall

73.3Claude Sonnet 5.5

72.1GPT-6 Astra

ACB

75.3Claude Sonnet 5.5

64.5GPT-6 Astra

HLE

64.5Claude Sonnet 5.5

57.2GPT-6 Astra

Terminal-Bench

83.2Claude Sonnet 5.5

88.4GPT-6 Astra

DeepSWE

71.0Claude Sonnet 5.5

73.2GPT-6 Astra

GDPval-AA

1844.2Claude Sonnet 5.5

1629.3GPT-6 Astra

Finance Agent

58.1Claude Sonnet 5.5

53.5GPT-6 Astra

Claude Sonnet 5.5

Input$2.00

Output$10.0

Workload$4.00

Context1M

GPT-6 Astra

Input$10.0

Output$50.0

Workload$20

Context1.05M

Workload = published cost of 1M input + 200K output tokens. Open the live leaderboard for interactive compare charts.

More Claude Sonnet 5.5 and GPT-6 Astra comparisons

Explore how Claude Sonnet 5.5 and GPT-6 Astra stack up against other top-ranked LLMs.

Claude Fable 5.1 vs Claude Sonnet 5.5 Claude Fable 5.1 vs GPT-6 Astra Claude Opus 5.5 vs Claude Sonnet 5.5 Claude Opus 5.5 vs GPT-6 Astra Claude Fable 5 vs Claude Sonnet 5.5 Claude Fable 5 vs GPT-6 Astra Claude Opus 5 vs Claude Sonnet 5.5 Claude Opus 5 vs GPT-6 Astra GPT-5.6 Sol vs Claude Sonnet 5.5 GPT-5.6 Sol vs GPT-6 Astra

How to read this comparison

Benchmark scores

Higher is better for all benchmark scores (SWE-bench, GPQA, HLE, Terminal-Bench, etc.). Green marks the model with the higher score.

Token pricing

Lower is better for input and output prices. Green marks the cheaper model per 1M tokens.

Coverage matters

Models with fewer disclosed benchmark cells may have inflated percentile scores. Check the benchmark cell count for context.

This comparison page is generated from the AskClash LLM leaderboard cache. Open the live leaderboard for real-time scores and interactive filtering.