How do GPT-5.6 Sol and Composer 2.5 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 Composer 2.5 when publicly disclosed.

LLM Comparison

GPT-5.6 Sol vs Composer 2.5: benchmark scores, pricing & comparison.

Q: Which is better: GPT-5.6 Sol or Composer 2.5?

AskClash compares GPT-5.6 Sol and Composer 2.5 side by side across SWE-bench, GPQA, HLE, Terminal-Bench, coding agent scores, token pricing, and context window so you can see which model wins on each benchmark.

Side-by-side GPT-5.6 Sol vs Composer 2.5 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 Composer 2.5 model page

Rank #2 vs #14AskClash overall scores 85.6 vs 67.0.

Pricing $5.00/$30.0 vs $0.50/$2.50Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryOpenAI vs Cursor.

GPT-5.6 Sol vs Composer 2.5 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	Composer 2.5
Overall Score	85.6	67.0
Leaderboard Rank	#2	#14
RWT	9.5	8.5
Coding Agent Index	80.0	51.8
HLE	47.2	—
GPQA	94.1	—
SWE-Pro	64.6	47.0
SWE-Atlas	84.0	72.0
Terminal-Bench	88.8	69.3
DeepSWE	72.7	—
Finance Agent	53.8	—
MMMU-Pro	83.0	—
ARC-AGI 2	92.5	—
Tau2	85.1	—
MRCR	91.5	—
Input Price (per 1M tokens)	$5.00	$0.50
Output Price (per 1M tokens)	$30.0	$2.50
Context Window	1M	200K
Benchmarks Published	14	4

GPT-5.6 Sol vs Composer 2.5 head-to-head charts

GPT-5.6 Sol leads 6 and Composer 2.5 leads 0 of 6 shared benchmarks. Composer 2.5 is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-5.6 SolComposer 2.5

Overall

85.6GPT-5.6 Sol

67.0Composer 2.5

RWT

9.5GPT-5.6 Sol

8.5Composer 2.5

Coding Agent Index

80.0GPT-5.6 Sol

51.8Composer 2.5

SWE-Pro

64.6GPT-5.6 Sol

47.0Composer 2.5

SWE-Atlas

84.0GPT-5.6 Sol

72.0Composer 2.5

Terminal-Bench

88.8GPT-5.6 Sol

69.3Composer 2.5

GPT-5.6 Sol

Input$5.00

Output$30.0

Workload$11

Context1M

Composer 2.5

Input$0.50

Output$2.50

Workload$1.00

Context200K

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

More GPT-5.6 Sol and Composer 2.5 comparisons

Explore how GPT-5.6 Sol and Composer 2.5 stack up against other top-ranked LLMs.

Claude Fable 5 vs GPT-5.6 Sol Claude Fable 5 vs Composer 2.5 GPT-5.6 Sol vs Kimi K3 Kimi K3 vs Composer 2.5 GPT-5.6 Sol vs Claude Opus 4.8 Claude Opus 4.8 vs Composer 2.5 GPT-5.6 Sol vs Grok 4.5 Grok 4.5 vs Composer 2.5 GPT-5.6 Sol vs Muse Spark 1.1 Muse Spark 1.1 vs Composer 2.5

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.