Compare models
Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.
4 is the maximum. Remove one to add another.
| Attribute | S1s1 | Claude Opus 5.5claude-opus-5.5 | S2 Pros2-pro | GPT-6 Sol Progpt-6-sol-pro |
|---|---|---|---|---|
| Pricing | ||||
| Input | $0 / 1M | $4.00 / 1M | $0 / 1M | $2.00 / 1M |
| Output | $0 / 1M | $20.00 / 1M | $0 / 1M | $10.00 / 1M |
| Cache Write (5m) | Not applicable | $5.00 / 1M | Not applicable | $2.00 / 1M |
| Cache Write (1h) | Not applicable | $8.00 / 1M | Not applicable | $2.00 / 1M |
| Cache Read | Not applicable | $0.40 / 1M | Not applicable | $2.00 / 1M |
| Web Search | $0 / 1M | $0 / 1M | $0 / 1M | $0 / 1M |
| Context | ||||
| Max context | N/A | 1M | N/A | 1.1M |
| Max output | N/A | N/A | N/A | N/A |
| Capabilities | ||||
| Vision | No | Yes | No | Yes |
| Function Calling | No | Yes | No | Yes |
| JSON Mode | No | Yes | No | Yes |
| Streaming | No | Yes | No | Yes |
| Catalogue | ||||
| Provider | Fish Audio | Anthropic | Fish Audio | OpenAI |
| Category | voice | chat | voice | chat |
| Charge type | Pay As You Go | Pay As You Go | Pay As You Go | Pay As You Go |
| Released | 2026-07-29 | — | 2026-07-29 | — |
| Description | ||||
| Summary | Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text. | Claude Opus 5.5 is Anthropic's flagship model for advanced reasoning, coding, and long-horizon agentic workflows, succeeding Opus 5. It excels at multi-step changes across large codebases, code review and bug detection, financial and scientific analysis, and understanding dense charts, diagrams, and screenshots, with stronger grounding when reporting figures and citing sources. Compared with Opus 5, it completes comparable tasks with fewer steps and lower token usage while providing clearer, more concise progress reporting. With adaptive thinking and configurable effort levels, Opus 5.5 can balance reasoning depth, latency, and cost, making it well suited for both demanding autonomous workflows and latency-sensitive professional tasks. | Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text. | GPT-6 Sol Pro uses the same underlying model as GPT-6 Sol, but runs with reasoning.mode set to pro for higher-quality responses on complex and demanding tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is particularly well suited for agentic coding, long-horizon software engineering, professional analysis, and complex automated workflows where solution quality takes priority over latency and cost. |