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gpt-5.6-solvsclaude-opus-5Both are available on APICLAN through one OpenAI-compatible endpoint, so switching between them is a one-word change. Here is what each actually costs you, and how much the difference is worth at your volume.
claude-opus-5 runs about
4% cheaper than gpt-5.6-sol. Both models are from
different families.Percentages are easy to shrug off. Put your real monthly volume in and see the number in dollars.
$25 versus $30 per million output tokens. On a bill of a few hundred dollars a month that difference is real but small — and it is almost always dwarfed by how the calls are structured.
Two things move the number far more than the 20%:
Output length. Output costs five times what input costs on both of these. A prompt change that makes answers 30% shorter saves more than switching models ever will, and it does not require re-validating anything.
What you send the flagship at all. Most agent loops fire the expensive model at every step, including classification and extraction steps that a cheap model handles identically. Routing only the final reasoning step to a flagship usually cuts the blended cost by more than half, whichever flagship you pick.
Pick between these two on output quality for your own task. Get the savings from the two things above, not from the choice.
We do not publish capability benchmarks, and you should be sceptical of anyone who does. Scores on public benchmarks rarely predict how a model behaves on your codebase, your prompts and your edge cases.
What we can tell you is exactly what each one costs. Run both against a real task from your own workload — switching takes one word — and let the cheaper one win unless it visibly fails.
A practical approach that works well in agent loops: route the bulk of calls to the cheaper model, and escalate to the more expensive one only when the first attempt fails a check. Most workloads are dominated by routine calls, so the blended cost lands close to the cheap model rather than the expensive one.
Same endpoint, same key, same request shape. Only the model string changes.
- model="gpt-5.6-sol",
+ model="claude-opus-5",If you have not connected yet, the quickstart takes about thirty seconds — you change your base URL and nothing else.
Prices verified 2026-10-10 and regenerated automatically from live billing data. List prices change; this page follows them.