Grok 4 wins on coding (92 vs 80). Gemini 3.1 Pro wins on writing quality. For most workflows, Grok 4 is the stronger default — strong coding value with 2m context — an underrated pick at this price.
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.
Grok 4 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-5.1-Codex-Max is the cheaper way in for Grok 4 vs Gemini 3.1 Pro, at $1.25/1M/1M input against Grok 4's $2.00/1M/1M.
Gemini 3.1 Pro 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 92 vs 80 for Gemini 3.1 Pro.
Both models are similarly priced — the decision comes down to capability, not cost.
Grok 4 is the stronger default for coding tasks.
Choose Grok 4 for coding and research at competitive pricing with maximum context. Its coding and research scores are what carry the recommendation here.
Gemini 3.1 Pro earns its place when your work is mostly research and deep document analysis, even though it loses the overall count here.
Both models serve different primary workflows — Grok 4 for coding and research at competitive pricing with maximum context, Gemini 3.1 Pro for research and deep document analysis — 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 / Sep 2, 2026
Best for research and deep document analysis — 2M context at the best premium price.
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.
Strong coding value with 2M context — an underrated pick at this price.
Best for research and deep document analysis — 2M context at the best premium price.
List prices and published scores — the numbers this page's pick is built from.
| Model | Input | Output | Est. month | Context | Speed | Coding | Writing | Research |
|---|---|---|---|---|---|---|---|---|
| Grok 4xAI | $2.00/1M | $6.00/1M | $32 | 2M tokens | Fast | 92 | 70 | 86 |
| Gemini 3.1 ProGoogle | $2.00/1M | $12.00/1M | $44 | 2M tokens | Balanced | 80 | 82 | 99 |
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.
The default answer for Grok 4 vs Gemini 3.1 Pro — 92/100 on the coding axis, and the model we would start with unless the price below rules it out.
xAI's latest flagship with strong coding benchmark performance, a 2M token context window, and aggressive pricing at $2/$6 per million tokens.
You need the highest writing quality or the most reliable production-grade output — Claude wins both.
Strong coding benchmark with excellent value. The $2/$6 pricing and 2M context make it competitive with more expensive alternatives.
Full pricing, benchmark table and release notes on the Grok 4 page.
Here for latency: it answers fastest of anything listed for Grok 4 vs Gemini 3.1 Pro, at 80/100 on coding.
Google's flagship with the largest context window of any frontier model at 2M tokens, Deep Think reasoning, and the best price-to-performance among premium models.
Your primary use case is writing quality or agentic coding — Claude wins both.
The best research and long-context model available. Handles entire codebases, legal documents, and large datasets in a single pass — at a lower price than GPT-5.4 or Claude Sonnet 4.6.
Full pricing, benchmark table and release notes on the Gemini 3.1 Pro page.
UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.
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Grok 4 wins on more of the categories we score — coding, research, reasoning — so it is the better default of the two. Gemini 3.1 Pro is the better pick when your work is mostly research and deep document analysis. Neither is universally "better": Grok 4 is aimed at coding and research at competitive pricing with maximum context, Gemini 3.1 Pro at research and deep document analysis.
Both models are similarly priced at $2/1M input tokens. The decision should come down to capability, not cost.
Both Grok 4 and Gemini 3.1 Pro have the same 2M context window.
Grok 4 is better for coding with a score of 92 vs Gemini 3.1 Pro's 80 (out of 100). GPT-6 Astra 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.
Claude Opus 4.6 and Sonnet 4.6 lead on pure coding benchmarks. 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. That is the main case for looking at Gemini 3.1 Pro instead.
Slower than Flash for everyday lightweight tasks. Claude Sonnet 4.6 is better for writing quality. Avoid it if your primary use case is writing quality or agentic coding — Claude wins both. Against Grok 4 specifically, the gap shows up most on coding (92 vs 80).
Take a moderate workload of 10M input and 2M output tokens a month. Grok 4 runs $32.00 (at $2/1M in and $6/1M out); Gemini 3.1 Pro runs $44.00 (at $2/1M in and $12/1M out). That is a $12.00/month difference — Grok 4 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 Grok 4 for coding and research at competitive pricing with maximum context, with Gemini 3.1 Pro handling research and deep document analysis. Since Grok 4 is both the stronger and the cheaper option here, a split mainly makes sense if Gemini 3.1 Pro covers a capability you specifically need.