Claude Opus 5 vs Claude Sonnet 5
The new Anthropic tier decision: whether Opus 5's depth and million-token window justify five times Sonnet's price.
What the numbers say
- Claude Sonnet 5 is about 2.5x cheaper on output tokens (110 vs 275 credits per 1M).
- Both take the same 1M-token context window.
- Claude Opus 5 is the newer release (July 2026 vs June 2026).
Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, raw provider rate with a 1.10x margin.
Side by side
Claude Opus 5
Anthropic
Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...
- Provider
- Anthropic
- Context window
- 1M tokens
- Input price
- 55.0 credits / 1M tokens ($5.00 raw)
- Output price
- 275 credits / 1M tokens ($25.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Claude Sonnet 5
Anthropic
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
- Provider
- Anthropic
- Context window
- 1M tokens
- Input price
- 22.0 credits / 1M tokens ($2.00 raw)
- Output price
- 110 credits / 1M tokens ($10.00 raw)
- Vision (image input)
- Yes
- Tool calling
- Yes
- Extended reasoning
- No
Best for
- Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
- Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
- Working with images: screenshots, charts, photos and scanned documents alongside text
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Try both on Zeplik
The honest answer to most model debates is to run your own prompt on both. Zeplik puts Claude Opus 5 and Claude Sonnet 5 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.
Explore Zeplik
- 465 AI skillsReady-to-run expert methods that run on Claude Opus 5, Claude Sonnet 5 or any other model.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.