// alternatives · October 2026
Gemini 3.1 Pro Preview Custom Tools alternatives
Cheaper models that come close, budget substitutes, and the cheapest step up — chosen on published LiveBench scores and live list price, never on our opinion. Every model here supports tool calling and image input, as Gemini 3.1 Pro Preview Custom Tools does.
LiveBench hasn't published a run for Gemini 3.1 Pro Preview Custom Tools. The strongest benchmarked model at a similar or lower price is GPT-6.1 Sol, scoring 84.1 overall.
Gemini 3.1 Pro Preview Custom Tools: no published LiveBench run, $4.50 per 1M blended tokens, about $1,600/mo for a RAG assistant.
Benchmarked models at or below its price
Gemini 3.1 Pro Preview Custom Tools has no published LiveBench run, so these are the highest-scoring benchmarked models priced no more than 25% above it — a known quantity to test against.
| Model | Overall | vs Gemini 3.1 Pro Preview Custom Tools | Blended / 1M | RAG assistant | Context |
|---|---|---|---|---|---|
| GPT-6.1 Solopenai 11% cheaper. Head to head → | 84.1 | — | $4.00−11% | $1,440/mo | 1.1M |
| Claude Sonnet 5.5anthropic 11% cheaper. Head to head → | 80.0 | — | $4.00−11% | $1,440/mo | 1M |
| Gemini 4 Argongoogle 11% cheaper. Head to head → | 79.3 | — | $4.00−11% | $1,440/mo | 1.0M |
| GPT-6.1 Terraopenai 56% cheaper. Head to head → | 77.8 | — | $2.00−56% | $720.00/mo | 1.1M |
| DeepSeek V4.1 Flash 1017deepseek 88% cheaper. Head to head → | 74.0 | — | $0.525−88% | $194.40/mo | 1.0M |
| Kimi K3.1 Promoonshotai 11% cheaper. Head to head → | 71.3 | — | $4.00−11% | $1,480/mo | 1.0M |
Gemini 3.1 Pro Preview Custom Tools alternatives FAQ
What is the best alternative to Gemini 3.1 Pro Preview Custom Tools?
GPT-6.1 Sol. 11% cheaper. Every suggestion supports tool calling and image input, like Gemini 3.1 Pro Preview Custom Tools.
How alternatives are chosen
- Scores — LiveBench release 2026-10-25. Only models with a published run are suggested on quality; a missing model means “not evaluated”, not “worse”.
- Prices — live list prices from OpenRouter, blended 3:1 input:output. Monthly figures price a RAG assistant with the published cached-input rate where there is one.
- Same job — suggestions must support every capability Gemini 3.1 Pro Preview Custom Tools has among tool calling and image input. Other listings of the same model (free or batch tiers) are variants, not alternatives, and are left out.
A few points on a public benchmark can hide large differences on your own tasks. Shortlist here, then decide with an eval — how to build one.