gemini-3.7-flash vs gpt-5.6-terra-pro for tool calling
As of August 24, 2026, gpt-5.6-terra-pro measures 0.972 on agentic tool use vs 0.950 for gemini-3.7-flash (+0.022), at 12.2× the price ($44.15 vs $3.63 per 1K requests).
same suite, same items, same scoring — frontier v4, measured 2026-08-24 · method
| model | vendor | measured quality | $ / 1K requests | p95 latency |
|---|---|---|---|---|
| gemini-3.7-flash | 0.950 | $3.63 | 12489 ms | |
| gpt-5.6-terra-pro | openai | 0.972 | $44.15 | 34671 ms |
Agent stacks live or die on tool calls: the right function, the right arguments, the discipline not to invent either. The measured suite scores tool-call validity deterministically. Whole-journey agent completion — plan, call, read, recover — is measured separately, because call-level scores can all look healthy while the journey fails.
These two are part of a larger measured frontier — what is the best model for tool calling shows every measured option for this workload, and other workloads rank these models differently: a model that wins here can lose on another kind of work, which is the whole argument for routing per workload rather than picking one model for everything.
Potion routes each request to the cheapest option measured at your quality bar — including picks this public page does not name. Get an API key or read the docs.