How do GPT-5.5 and Gemini 3.5 Flash-Lite 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-5.5 and Gemini 3.5 Flash-Lite when publicly disclosed.

LLM Comparison

GPT-5.5 vs Gemini 3.5 Flash-Lite: benchmark scores, pricing & comparison.

Q: Which is better: GPT-5.5 or Gemini 3.5 Flash-Lite?

AskClash compares GPT-5.5 and Gemini 3.5 Flash-Lite 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-5.5 vs Gemini 3.5 Flash-Lite 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-5.5 model page Gemini 3.5 Flash-Lite model page

Rank #10 vs #61AskClash overall scores 75.6 vs 14.2.

Pricing $5.00/$30.0 vs $0.30/$2.50Input and output token prices per 1M tokens when published.

Proprietary vs ProprietaryOpenAI vs Google.

GPT-5.5 vs Gemini 3.5 Flash-Lite benchmark comparison

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

Metric	GPT-5.5	Gemini 3.5 Flash-Lite
Overall Score	75.6	14.2
Leaderboard Rank	#10	#61
RWT	8.0	7.0
Coding Agent Index	56.6	—
HLE	52.2	—
GPQA	93.6	—
SWE-Pro	58.6	54.2
Terminal-Bench	82.7	54.0
DeepSWE	67.0	—
OSWorld	78.7	74.0
MCP Atlas	75.3	—
Finance Agent	51.8	—
MMMU-Pro	81.2	—
ARC-AGI 2	85.0	—
Tau2	98.0	—
MRCR	—	72.2
Input Price (per 1M tokens)	$5.00	$0.30
Output Price (per 1M tokens)	$30.0	$2.50
Context Window	1M	1M
Benchmarks Published	13	6

GPT-5.5 vs Gemini 3.5 Flash-Lite head-to-head charts

GPT-5.5 leads 5 and Gemini 3.5 Flash-Lite leads 0 of 5 shared benchmarks. Gemini 3.5 Flash-Lite is cheaper on a defined 1M-input / 200K-output workload. Charts show only benchmarks both models publish.

GPT-5.5Gemini 3.5 Flash-Lite

Overall

75.6GPT-5.5

14.2Gemini 3.5 Flash-Lite

RWT

8.0GPT-5.5

7.0Gemini 3.5 Flash-Lite

SWE-Pro

58.6GPT-5.5

54.2Gemini 3.5 Flash-Lite

Terminal-Bench

82.7GPT-5.5

54.0Gemini 3.5 Flash-Lite

OSWorld

78.7GPT-5.5

74.0Gemini 3.5 Flash-Lite

GPT-5.5

Input$5.00

Output$30.0

Workload$11

Context1M

Gemini 3.5 Flash-Lite

Input$0.30

Output$2.50

Workload$0.80

Context1M

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

More GPT-5.5 and Gemini 3.5 Flash-Lite comparisons

Explore how GPT-5.5 and Gemini 3.5 Flash-Lite stack up against other top-ranked LLMs.

Claude Fable 5 vs GPT-5.5 Claude Fable 5 vs Gemini 3.5 Flash-Lite GPT-5.6 Sol vs GPT-5.5 GPT-5.6 Sol vs Gemini 3.5 Flash-Lite Kimi K3 vs GPT-5.5 Kimi K3 vs Gemini 3.5 Flash-Lite Claude Opus 4.8 vs GPT-5.5 Claude Opus 4.8 vs Gemini 3.5 Flash-Lite Grok 4.5 vs GPT-5.5 Grok 4.5 vs Gemini 3.5 Flash-Lite

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.