LLM Comparison

GPT-5.5 vs Gemini 3.1 Pro: benchmark scores, pricing & comparison.

Side-by-side GPT-5.5 vs Gemini 3.1 Pro 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 leaderboardGPT-5.5 model pageGemini 3.1 Pro model page
Rank #10 vs #24AskClash overall scores 75.5 vs 51.9.
Pricing $5.00/$30.0 vs $2.00/$12.0Input and output token prices per 1M tokens when published.
Proprietary vs ProprietaryOpenAI vs Google.

GPT-5.5 vs Gemini 3.1 Pro benchmark comparison

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

MetricGPT-5.5Gemini 3.1 Pro
Overall Score75.551.9
Leaderboard Rank#10#24
RWT8.0—
Coding Agent Index56.629.2
HLE52.251.4
GPQA93.694.3
SWE-bench—80.6
SWE-Pro58.654.2
Terminal-Bench82.768.5
DeepSWE67.011.8
OSWorld78.7—
MCP Atlas75.369.2
Finance Agent51.843.0
CharXiv—80.2
MMMU-Pro81.283.9
ARC-AGI 285.077.1
Tau298.099.3
MRCR—84.9
Input Price (per 1M tokens)$5.00$2.00
Output Price (per 1M tokens)$30.0$12.0
Context Window1M1M
Benchmarks Published1316

GPT-5.5 vs Gemini 3.1 Pro head-to-head charts

GPT-5.5 leads 9 and Gemini 3.1 Pro leads 3 of 12 shared benchmarks. Gemini 3.1 Pro is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-5.5Gemini 3.1 Pro
Overall
75.5GPT-5.5
51.9Gemini 3.1 Pro
Coding Agent Index
56.6GPT-5.5
29.2Gemini 3.1 Pro
HLE
52.2GPT-5.5
51.4Gemini 3.1 Pro
GPQA
93.6GPT-5.5
94.3Gemini 3.1 Pro
SWE-Pro
58.6GPT-5.5
54.2Gemini 3.1 Pro
Terminal-Bench
82.7GPT-5.5
68.5Gemini 3.1 Pro
DeepSWE
67.0GPT-5.5
11.8Gemini 3.1 Pro
MCP Atlas
75.3GPT-5.5
69.2Gemini 3.1 Pro
Finance Agent
51.8GPT-5.5
43.0Gemini 3.1 Pro
MMMU-Pro
81.2GPT-5.5
83.9Gemini 3.1 Pro
ARC-AGI 2
85.0GPT-5.5
77.1Gemini 3.1 Pro
Tau2
98.0GPT-5.5
99.3Gemini 3.1 Pro
GPT-5.5
Input$5.00
Output$30.0
Workload$11
Context1M
Gemini 3.1 Pro
Input$2.00
Output$12.0
Workload$4.40
Context1M

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

More GPT-5.5 and Gemini 3.1 Pro comparisons

Explore how GPT-5.5 and Gemini 3.1 Pro stack up against other top-ranked LLMs.

Claude Fable 5 vs GPT-5.5Claude Fable 5 vs Gemini 3.1 ProGPT-5.6 Sol vs GPT-5.5GPT-5.6 Sol vs Gemini 3.1 ProKimi K3 vs GPT-5.5Kimi K3 vs Gemini 3.1 ProClaude Opus 4.8 vs GPT-5.5Claude Opus 4.8 vs Gemini 3.1 ProGrok 4.5 vs GPT-5.5Grok 4.5 vs Gemini 3.1 Pro

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.