OpenAI GPT-5.5 vs Google Gemini 3.1 Pro Preview: Value Fight
My call: Google Gemini 3.1 Pro Preview wins the value brawl for most teams, while OpenAI GPT-5.5 is the safer all-rounder if you prize ecosystem and steadier general output. Gemini hits harder on price and reasoning buzz; GPT-5.5 answers with a 62.9 LLM Stats score and broader utility.
Price: Gemini throws the cheaper combinations
Google Gemini 3.1 Pro Preview is priced at $2.00/1M input tokens and $12.00/1M output tokens. OpenAI GPT-5.5 costs $5.00/1M input tokens and $30.00/1M output tokens. That’s not a jab; that’s a clean cost gap.
For high-volume summarization, research routing, multi-agent drafts, and long test runs, Gemini’s lower tariff matters fast. GPT-5.5 needs to justify a 2.5x input premium and a 2.5x output premium. It can, but only when the workflow really benefits from its broader ecosystem and consistency.
Benchmarks: GPT has the score, Gemini has the reasoning heat
The live comparison set gives OpenAI GPT-5.5 a 62.9 LLM Stats overall score. That’s a serious number, though it trails Claude Opus 4.8 at 67.9. Gemini 3.1 Pro Preview is called out as leading reasoning benchmarks, which makes it dangerous in math-heavy planning, structured analysis, and hard multi-step prompts.
Provider-level Arena Elo also keeps this close: Google sits at 1,494, while OpenAI is at 1,481. That’s not a model-specific knockout, but it does show why this matchup is hot right now. These two are operating in the same top-tier neighborhood.