Claude Opus 5 vs Solar Pro 4: side-by-side summary

Claude Opus 5 and Solar Pro 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Claude Opus 5, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.

Solar Pro 4, from upstage, has a 524,288-token context window and is priced at $0.03/M tokens input, $0.12/M tokens output on OpenRouter.

Context window

• Claude Opus 5: 1,000,000 tokens
• Solar Pro 4: 524,288 tokens

Price

• Claude Opus 5: $5/M tokens input, $25/M tokens output
• Solar Pro 4: $0.03/M tokens input, $0.12/M tokens output

Provided by

• Claude Opus 5: Anthropic
• Solar Pro 4: upstage

• Claude Opus 5 model details, providers and pricing
• Solar Pro 4 model details, providers and pricing