LLM Comparison

Claude Opus 5 vs GPT-5.5: benchmark scores, pricing & comparison.

Side-by-side Claude Opus 5 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.

Open live leaderboardClaude Opus 5 model pageGPT-5.5 model page
Rank #1 vs #7AskClash overall scores 94.2 vs 76.4.
Pricing $5.00/$25.0 vs $5.00/$30.0Input and output token prices per 1M tokens when published.
Proprietary vs ProprietaryAnthropic vs OpenAI.

Claude Opus 5 vs GPT-5.5 benchmark comparison

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

MetricClaude Opus 5GPT-5.5
Overall Score94.276.4
Leaderboard Rank#1#7
RWT9.08.0
Coding Agent Index—61.5
HLE64.752.2
GPQA—93.6
SWE-bench96.0—
SWE-Pro79.258.6
Terminal-Bench—82.7
DeepSWE68.867.0
OSWorld—78.7
MCP Atlas85.875.3
Finance Agent—51.8
MMMU-Pro—81.2
ARC-AGI 290.485.0
Tau2—98.0
Input Price (per 1M tokens)$5.00$5.00
Output Price (per 1M tokens)$25.0$30.0
Context Window1M1M
Benchmarks Published814

Claude Opus 5 vs GPT-5.5 head-to-head charts

Claude Opus 5 leads 7 and GPT-5.5 leads 0 of 7 shared benchmarks. Claude Opus 5 is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

Claude Opus 5GPT-5.5
Overall
94.2Claude Opus 5
76.4GPT-5.5
RWT
9.0Claude Opus 5
8.0GPT-5.5
HLE
64.7Claude Opus 5
52.2GPT-5.5
SWE-Pro
79.2Claude Opus 5
58.6GPT-5.5
DeepSWE
68.8Claude Opus 5
67.0GPT-5.5
MCP Atlas
85.8Claude Opus 5
75.3GPT-5.5
ARC-AGI 2
90.4Claude Opus 5
85.0GPT-5.5
Claude Opus 5
Input$5.00
Output$25.0
Workload$10
Context1M
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 Claude Opus 5 and GPT-5.5 comparisons

Explore how Claude Opus 5 and GPT-5.5 stack up against other top-ranked LLMs.

Claude Opus 5 vs Claude Fable 5Claude Fable 5 vs GPT-5.5Claude Opus 5 vs GPT-5.6 SolGPT-5.6 Sol vs GPT-5.5Claude Opus 5 vs Claude Opus 4.8Claude Opus 4.8 vs GPT-5.5Claude Opus 5 vs Claude Opus 4.7Claude Opus 4.7 vs GPT-5.5Claude Opus 5 vs Kimi K3Kimi K3 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.