How do GPT-5.6 Sol 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 GPT-5.6 Sol and GPT-6 Astra when publicly disclosed.

LLM Comparison

GPT-5.6 Sol vs GPT-6 Astra: benchmark scores, pricing & comparison.

Q: Which is better: GPT-5.6 Sol or GPT-6 Astra?

AskClash compares GPT-5.6 Sol 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.

Side-by-side GPT-5.6 Sol 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.

Open live leaderboard GPT-5.6 Sol model page GPT-6 Astra model page

Rank #3 vs #7AskClash overall scores 68.6 vs 64.9.

Pricing $5.00/$30.0 vs $10.0/$50.0Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryOpenAI vs OpenAI.

GPT-5.6 Sol 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	GPT-5.6 Sol	GPT-6 Astra
Overall Score	68.6	64.9
Leaderboard Rank	#3	#7
ACB	63.2	—
RWT	9.5	9.5
Coding Agent Index	80.0	67.0
HLE	47.2	57.2
GPQA	94.1	96.0
SWE-Pro	64.6	—
SWE-Atlas	84.0	—
Terminal-Bench	88.8	—
DeepSWE	72.7	74.1
GDPval-AA	1748.0	—
Finance Agent	53.8	—
MMMU-Pro	83.0	—
ARC-AGI 2	92.5	95.0
Tau2	85.1	—
MRCR	91.5	100.0
Input Price (per 1M tokens)	$5.00	$10.0
Output Price (per 1M tokens)	$30.0	$50.0
Context Window	1M	1M
Benchmarks Published	15	7

GPT-5.6 Sol vs GPT-6 Astra head-to-head charts

GPT-5.6 Sol leads 2 and GPT-6 Astra leads 5 of 8 shared benchmarks. GPT-5.6 Sol is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-5.6 SolGPT-6 Astra

Overall

68.6GPT-5.6 Sol

64.9GPT-6 Astra

RWT

9.5GPT-5.6 Sol

9.5GPT-6 Astra

Coding Agent Index

80.0GPT-5.6 Sol

67.0GPT-6 Astra

HLE

47.2GPT-5.6 Sol

57.2GPT-6 Astra

GPQA

94.1GPT-5.6 Sol

96.0GPT-6 Astra

DeepSWE

72.7GPT-5.6 Sol

74.1GPT-6 Astra

ARC-AGI 2

92.5GPT-5.6 Sol

95.0GPT-6 Astra

MRCR

91.5GPT-5.6 Sol

100.0GPT-6 Astra

GPT-5.6 Sol

Input$5.00

Output$30.0

Workload$11

Context1M

GPT-6 Astra

Input$10.0

Output$50.0

Workload$20

Context1M

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

More GPT-5.6 Sol and GPT-6 Astra comparisons

Explore how GPT-5.6 Sol and GPT-6 Astra stack up against other top-ranked LLMs.

Claude Fable 5.1 vs GPT-5.6 Sol Claude Fable 5.1 vs GPT-6 Astra Claude Fable 5 vs GPT-5.6 Sol Claude Fable 5 vs GPT-6 Astra GPT-5.6 Sol vs Claude Opus 5 Claude Opus 5 vs GPT-6 Astra GPT-5.6 Sol vs Grok 4.6 Grok 4.6 vs GPT-6 Astra GPT-5.6 Sol vs Claude Opus 4.8 Claude Opus 4.8 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.