Gemini 3.1 Pro wins on writing quality and price ($2 vs $3/1M input) and context window (1M vs 256K). For most workflows, Gemini 3.1 Pro is the stronger default — google's pro model — 1m context and native multimodal input at $2/$12.
The safest Grok 4 vs Gemini 3.1 Pro default, the cheaper option worth trying first, and the specialist pick — before you read the detail below.
Gemini 3.1 Pro is the strongest answer here for Grok 4 vs Gemini 3.1 Pro — pick it when quality of output matters more than the $2.00/1M/1M input you pay for it.
GPT-6.1 Sol handles the same job for about 14% less per token. Start here and only move up if the output is not good enough.
Grok 4 is the fastest of these for Grok 4 vs Gemini 3.1 Pro — worth it when latency is what the reader notices, not the last few points of reasoning depth.
Grok 4 leads on coding with a score of 80 vs 80 for Gemini 3.1 Pro.
Gemini 3.1 Pro has the larger context window: 1M vs 256K for Grok 4.
Gemini 3.1 Pro is cheaper at $2/1M input tokens vs $3/1M for Grok 4.
Choose Gemini 3.1 Pro for research, deep document analysis, and long-context reasoning at competitive pricing. Its research and long context scores are what carry the recommendation here.
Grok 4 earns its place when your work is mostly historical reference — use Grok 4.7 for new work, even though it loses the overall count here.
Both models serve different primary workflows — Gemini 3.1 Pro for research and deep document analysis, Grok 4 for historical reference — use Grok 4.7 for new work — so running each where it has a clear edge often beats forcing one to do both.
Switch the scoring lens to see whether the Grok 4 vs Gemini 3.1 Pro answer changes when cost, speed, or long-document depth leads the decision.
Google / Premium / Oct 11, 2026
Google's Pro model — 1M context and native multimodal input at $2/$12.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
Your primary use case is writing quality or agentic coding — Claude wins both.
Where the Grok 4 vs Gemini 3.1 Pro recommendation shifts once you weigh price or latency differently.
Retired May 15, 2026 — replaced by Grok 4.6 and Grok 4.7.
Google's Pro model — 1M context and native multimodal input at $2/$12.
List prices and published scores — the numbers this page's pick is built from.
| Model | Input | Output | Est. month | Context | Speed | Coding | Writing | Research |
|---|---|---|---|---|---|---|---|---|
| Gemini 3.1 ProGoogle | $2.00/1M | $12.00/1M | $44 | 1M tokens | Balanced | 80 | 82 | 94 |
| Grok 4xAI | $3.00/1M | $15.00/1M | $60 | 256k tokens | Fast | 80 | 70 | 78 |
Scores out of 100 — how we evaluate models. “Est. month” is 10M in / 2M out at list price: a ceiling, no discounts.
Why each one is on the shortlist for Grok 4 vs Gemini 3.1 Pro, what it is genuinely good at, and where we would steer you away from it.
Ranked first here for Grok 4 vs Gemini 3.1 Pro: 94/100 on research, with the widest margin of anything in this line-up.
Google's Pro-tier Gemini 3 model, released in preview on February 19, 2026, with a 1M-token context window, Deep Think reasoning and $2/$12 pricing.
Your primary use case is writing quality or agentic coding — Claude wins both.
A capable research model and still Google's current Pro tier, but no longer the long-context leader: its 1M-token window matches Claude Opus 5.5 and is slightly below the GPT-6 family's 1.05M. Choose it for Google Workspace integration and multimodal input; for most research, Claude Opus 5.5 or GPT-6.1 Sol are stronger at a similar price.
Full pricing, benchmark table and release notes on the Gemini 3.1 Pro page.
The fastest model in this shortlist for Grok 4 vs Gemini 3.1 Pro. Pick it when turnaround is what your readers or users notice.
xAI's July 2025 flagship, priced at $3/$15 per million tokens with a 256K context window. Retired from xAI's API on May 15, 2026; current Grok models are Grok 4.6 and Grok 4.7.
You need the highest writing quality or the most reliable production-grade output — Claude wins both.
Retired: xAI shut down the grok-4-0709 API on May 15, 2026. It was a strong coding model at launch, at $3/$15 with a 256K window; earlier versions of this page listed $2/$6 and 2M tokens in error. Use Grok 4.7 instead.
Full pricing, benchmark table and release notes on the Grok 4 page.
UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.
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Gemini 3.1 Pro wins on more of the categories we score — research, long context, reasoning — so it is the better default of the two. Grok 4 is the better pick when your work is mostly historical reference — use Grok 4.7 for new work. Neither is universally "better": Gemini 3.1 Pro is aimed at research and deep document analysis, Grok 4 at historical reference — use Grok 4.7 for new work.
Gemini 3.1 Pro is cheaper at $2/1M input and $12/1M output. Grok 4 costs $3/1M input and $15/1M output.
Gemini 3.1 Pro has the larger context window at 1M tokens vs Grok 4's 256K. For large document analysis, Gemini 3.1 Pro is the stronger pick.
Grok 4 and Gemini 3.1 Pro are similarly matched on coding. Claude Opus 5.5 is the overall coding leader in this directory at 100/100.
Grok 4 is faster with a fast speed rating (score: 4) vs Gemini 3.1 Pro's balanced rating (score: 3). Speed matters most for interactive and high-throughput work; for batch jobs the Gemini 3.1 Pro latency penalty is usually invisible.
Slower than Flash for everyday lightweight tasks. Claude Sonnet 5.5 is better for writing quality, at a lower $2/$10. Avoid it if your primary use case is writing quality or agentic coding — Claude wins both. That is the main case for looking at Grok 4 instead.
Retired from xAI's API on May 15, 2026. Less established ecosystem and tooling than OpenAI or Anthropic. Avoid it if you need the highest writing quality or the most reliable production-grade output — Claude wins both. Against Gemini 3.1 Pro specifically, the two are close enough on capability that price and speed decide it.
Take a moderate workload of 10M input and 2M output tokens a month. Grok 4 runs $60.00 (at $3/1M in and $15/1M out); Gemini 3.1 Pro runs $44.00 (at $2/1M in and $12/1M out). That is a $16.00/month difference — Gemini 3.1 Pro is the cheaper of the two at this volume, and the gap scales linearly as you send more. Output tokens dominate the bill on both, so prompt length matters far less than response length.
Yes, and for most teams that beats picking one. A common split is Gemini 3.1 Pro for research and deep document analysis, with Grok 4 handling historical reference — use Grok 4.7 for new work. Since Gemini 3.1 Pro is both the stronger and the cheaper option here, a split mainly makes sense if Grok 4 covers a capability you specifically need.