GPT-5.5 vs Claude Opus 4.7 vs Gemini 3.1 Pro

OpenAI ($5 / $30), Anthropic ($5 / $25), Google ($2 / $12) per 1M tokens — the three flagships of 2026.

Three frontier models, three very different price points. GPT-5.5 is OpenAI's flagship at $5 / $30. Claude Opus 4.7 is Anthropic's at $5 / $25. Gemini 3.1 Pro undercuts both at $2 / $12 for contexts under 200K (and $4 / $18 above).

On a typical 4:1 input/output workload (10M input + 2.5M output tokens), the bills look like: GPT-5.5 ≈ $125; Opus 4.7 ≈ $113; Gemini 3.1 Pro ≈ $50. Gemini wins on pure cost; quality varies by task — run all three in the calculator below against your real usage.

Models included

GPT-5.5 (OpenAI) — $5.00 input / $30.00 output per 1M tokens · 1M context window
Claude Opus 4.7 (Anthropic) — $5.00 input / $25.00 output per 1M tokens · 1M context window
Gemini 3.1 Pro (Google) — $2.00 input / $12.00 output per 1M tokens · 2M context window

Frequently asked questions

Which is cheapest: GPT-5.5, Claude Opus 4.7, or Gemini 3.1 Pro?

Gemini 3.1 Pro is the cheapest of the three flagships in 2026 at $2 / $12 per 1M (under 200K context). GPT-5.5 and Claude Opus 4.7 are close to each other; Opus is slightly cheaper on output.

Which has the biggest context window?

Gemini 3.1 Pro at 2M tokens, twice the 1M offered by GPT-5.5 and Claude Opus 4.7. But Gemini above 200K incurs a long-context surcharge — read the per-tier pricing carefully.

Which is best for production use in 2026?

It depends on the workload. Heavy reasoning: GPT-5.5 Pro or Opus 4.7. Long-context analysis: Gemini 3.1 Pro. Balanced production chat / coding: Sonnet 4.6 or Gemini 3.5 Flash. Use the calculator below to put your actual usage against each.