Prices → Compare → GPT-5.6 Sol vs Claude Opus 5
GPT-5.6 Sol vs Claude Opus 5: API cost compared
GPT-5.6 Sol lists at $2.500 in / $15.00 out per 1M tokens. Claude Opus 5 lists at $5.000 in / $25.00. Sticker price only tells you so much — below is what each actually costs across eight production workloads.
Side by side
| GPT-5.6 Sol | Claude Opus 5 | |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Input per 1M | $2.500 | $5.000 |
| Output per 1M | $15.00 | $25.00 |
| Cached input per 1M | $0.250 | $0.500 |
| Context window | 400k | 200k |
| Blended per 1M (3:1) | $5.625 | $10.00 |
Monthly cost by workload
Caching applied at each workload's typical hit rate. This is where the two models actually separate.
| Workload | GPT-5.6 Sol | Claude Opus 5 | Cheaper | Difference |
|---|---|---|---|---|
| Customer support chatbot | $366.00 | $644.50 | GPT-5.6 Sol | $278.50 (43%) |
| RAG document Q&A | $490.00 | $920.00 | GPT-5.6 Sol | $430.00 (47%) |
| Coding agent | $261.25 | $462.50 | GPT-5.6 Sol | $201.25 (44%) |
| Bulk summarization | $3,465 | $6,730 | GPT-5.6 Sol | $3,265 (49%) |
| Structured data extraction | $4,675 | $8,725 | GPT-5.6 Sol | $4,050 (46%) |
| Long-form content generation | $636.50 | $1,073 | GPT-5.6 Sol | $436.50 (41%) |
| Email triage agent | $1,081 | $2,012 | GPT-5.6 Sol | $931.25 (46%) |
| Translation pipeline | $4,112 | $7,024 | GPT-5.6 Sol | $2,912 (41%) |
How to read this
GPT-5.6 Sol is cheaper on the majority of these workloads, but "majority" is not the decision. The output:input price ratio is 6.0 for GPT-5.6 Sol and 5.0 for Claude Opus 5. If your traffic is output-heavy — long-form drafting, translation — the model with the lower output price wins regardless of what the input price suggests. If you are input-heavy — RAG, bulk summarization, agents re-reading a codebase — the cached input rate matters more than either headline number.
Cost is also not the only axis. This site does not benchmark quality, latency, or rate limits, and a model that is 3x cheaper but needs two attempts per task is not cheaper. Use these numbers to size a bill, then validate on your own evals.
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Cost calculator
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| Model | In /1M | Out /1M | Monthly | vs best |
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