Substitutes · Claude Opus 510 alternatives · within 10% performance · lower price
Cheaper alternatives to Claude Opus 5
Drop-in substitutes within 10% of Claude Opus 5's average benchmark, priced lower, sorted by price. Target price $5.00/M · target score 69.4.
gpt-oss-120b (free)
OpenAI
Price
Free
Score
68.7
Ctx
131K
Save 100%·99% of Claude Opus 5
Side-by-side Frequently Asked Questions
The cheapest drop-in alternative is gpt-oss-120b (free) at Free/M input · 100% cheaper than Claude Opus 5 with 99% of the benchmark score.