Claude Opus 4.8 vs Gemini 3.1 Pro Preview
Premium-tier depth against premium-tier context: Opus quality versus Gemini scale.
What the numbers say
- Gemini 3.1 Pro Preview is about 2.1x cheaper on output tokens (132 vs 275 credits per 1M).
- Claude Opus 4.8 is the newer release (May 2026 vs February 2026).
Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, raw provider rate with a 1.10x margin.
Side by side
Claude Opus 4.8
Anthropic
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
- Provider
- Anthropic
- Context window
- 1M tokens
- Input price
- 55.0 credits / 1M tokens ($5.00 raw)
- Output price
- 275 credits / 1M tokens ($25.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Gemini 3.1 Pro Preview
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...
- Provider
- Context window
- 1.0M tokens
- Input price
- 22.0 credits / 1M tokens ($2.00 raw)
- Output price
- 132 credits / 1M tokens ($12.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
- Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Try both on Zeplik
The honest answer to most model debates is to run your own prompt on both. Zeplik puts Claude Opus 4.8 and Gemini 3.1 Pro Preview in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.