// alternatives · October 2026
o1 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 o1 does.
LiveBench hasn't published a run for o1. The strongest benchmarked model at a similar or lower price is Claude Fable 5.1, scoring 85.7 overall.
o1: no published LiveBench run, $26.25 per 1M blended tokens, about $12,600/mo for a RAG assistant.
Benchmarked models at or below its price
o1 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 o1 | Blended / 1M | RAG assistant | Context |
|---|---|---|---|---|---|
| Claude Fable 5.1anthropic 24% cheaper. Head to head → | 85.7 | — | $20.00−24% | $7,100/mo | 1M |
| GPT-6 Astraopenai 24% cheaper. Head to head → | 85.6 | — | $20.00−24% | $7,400/mo | 1.1M |
| Claude Opus 5.5anthropic 70% cheaper. Head to head → | 85.1 | — | $8.00−70% | $2,880/mo | 1M |
| GPT-6.1 Solopenai 85% cheaper. Head to head → | 84.1 | — | $4.00−85% | $1,440/mo | 1.1M |
| Claude Sonnet 5.5anthropic 85% cheaper. Head to head → | 80.0 | — | $4.00−85% | $1,440/mo | 1M |
| Gemini 4 Argongoogle 85% cheaper. Head to head → | 79.3 | — | $4.00−85% | $1,440/mo | 1.0M |
o1 alternatives FAQ
What is the best alternative to o1?
Claude Fable 5.1. 24% cheaper. Every suggestion supports tool calling and image input, like o1.
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 o1 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.