Which is better: GPT-6 Sol or GPT-5.5?

Verdict: GPT-6 Sol ranks higher (#20 vs #30) and wins 5 of 8 shared benchmarks; GPT-6 Sol costs less ($2.00/$10.0 vs $5.00/$30.0 per 1M tokens). AskClash compares GPT-6 Sol and GPT-5.5 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 GPT-6 Sol and GPT-5.5 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-6 Sol and GPT-5.5 when publicly disclosed.

LLM Comparison

GPT-6 Sol vs GPT-5.5: benchmark scores, pricing & comparison.

Side-by-side GPT-6 Sol vs GPT-5.5 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.

Verdict: GPT-6 Sol ranks higher (#20 vs #30) and wins 5 of 8 shared benchmarks; GPT-6 Sol costs less ($2.00/$10.0 vs $5.00/$30.0 per 1M tokens).

Open live leaderboard GPT-6 Sol model page GPT-5.5 model page

Rank #20 vs #30AskClash overall scores 59.3 vs 53.8.

Pricing $2.00/$10.0 vs $5.00/$30.0Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryOpenAI vs OpenAI.

GPT-6 Sol vs GPT-5.5 benchmark comparison

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

Metric	GPT-6 Sol	GPT-5.5
Overall Score	59.3	53.8
Leaderboard Rank	#20	#30
ACB	55.8	62.0
RWT	—	8.0
Coding Agent Index	56.7	—
HLE	47.9	52.2
GPQA	—	93.6
IFEval	—	75.9
SWE-Pro	—	58.6
SWE-Atlas	57.5	—
Terminal-Bench	43.9	14.7
DeepSWE	68.8	67.0
GDPval-AA	1509.9	1353.2
OSWorld	—	78.7
MCP Atlas	—	75.3
Finance Agent	49.0	51.8
MMMU-Pro	82.9	81.2
ARC-AGI 2	89.6	85.0
Tau2	—	98.0
Input Price (per 1M tokens)	$2.00	$5.00
Output Price (per 1M tokens)	$10.0	$30.0
Context Window	1.05M	1M
Benchmarks Published	13	14

GPT-6 Sol vs GPT-5.5 head-to-head charts

GPT-6 Sol leads 6 and GPT-5.5 leads 3 of 9 shared benchmarks. GPT-6 Sol is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-6 SolGPT-5.5

Overall

59.3GPT-6 Sol

53.8GPT-5.5

ACB

55.8GPT-6 Sol

62.0GPT-5.5

HLE

47.9GPT-6 Sol

52.2GPT-5.5

Terminal-Bench

43.9GPT-6 Sol

14.7GPT-5.5

DeepSWE

68.8GPT-6 Sol

67.0GPT-5.5

GDPval-AA

1509.9GPT-6 Sol

1353.2GPT-5.5

Finance Agent

49.0GPT-6 Sol

51.8GPT-5.5

MMMU-Pro

82.9GPT-6 Sol

81.2GPT-5.5

ARC-AGI 2

89.6GPT-6 Sol

85.0GPT-5.5

GPT-6 Sol

Input$2.00

Output$10.0

Workload$4.00

Context1.05M

GPT-5.5

Input$5.00

Output$30.0

Workload$11

Context1M

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

More GPT-6 Sol and GPT-5.5 comparisons

Explore how GPT-6 Sol and GPT-5.5 stack up against other top-ranked LLMs.

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

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.