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.

GPT-6 Sol ProOpenAI Remove
Claude Opus 5.5Anthropic Remove
S1Fish Audio Remove
Claude Sonnet 5.5Anthropic Remove

4 is the maximum. Remove one to add another.

gpt-6-sol-pro vs claude-opus-5.5 vs s1 vs claude-sonnet-5.5
Attribute	GPT-6 Sol Progpt-6-sol-pro	Claude Opus 5.5claude-opus-5.5	S1s1	Claude Sonnet 5.5claude-sonnet-5.5
Pricing
Input	$2.00 / 1M	$4.00 / 1M	$0 / 1M	$2.00 / 1M
Output	$10.00 / 1M	$20.00 / 1M	$0 / 1M	$10.00 / 1M
Cache Write (5m)	$2.00 / 1M	$5.00 / 1M	Not applicable	$2.50 / 1M
Cache Write (1h)	$2.00 / 1M	$8.00 / 1M	Not applicable	$4.00 / 1M
Cache Read	$2.00 / 1M	$0.40 / 1M	Not applicable	$0.20 / 1M
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1.1M	1M	N/A	1M
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	No	Yes
Function Calling	Yes	Yes	No	Yes
JSON Mode	Yes	Yes	No	Yes
Streaming	Yes	Yes	No	Yes
Catalogue
Provider	OpenAI	Anthropic	Fish Audio	Anthropic
Category	chat	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	—
Description
Summary	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.	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 S1 text-to-speech. Billed per UTF-8 byte of input text.	Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predecessor.