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Claude Opus 5 vs Mercury 2.5

At a glance

Anthropic's flagship for demanding reasoning, coding, and long-horizon agentic work.

1M ctx$5.00/$25.00 per M

Inception's latest diffusion LLM and the fastest reasoning model available, producing and refining tokens in parallel instead of one at a time.

260K ctx$0.04/$0.15 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper99%
Specs
1M
Context
128K
Max output
Jul 2026
Released
260K
Context
66K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$5.00/M tokens
Output$25.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input99%$0.04/M tokens
Output99%$0.15/M tokens
Cache read99%$0.004/M tokens
Chat with Claude Opus 5Go to model
Chat with Mercury 2.5Go to model
Frequently Asked Questions: Claude Opus 5 vs Mercury 2.5▼

Which is better, Claude Opus 5 or Mercury 2.5?

▼

Both Claude Opus 5 and Mercury 2.5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Claude Opus 5 or Mercury 2.5?

▼

Mercury 2.5 has a lower blended cost. Claude Opus 5: $5.00 input / $25.00 output. Mercury 2.5: $0.04 input / $0.15 output.

Which has a larger context window, Claude Opus 5 or Mercury 2.5?

▼

Claude Opus 5 has a larger context window: Claude Opus 5 supports 1M tokens vs Mercury 2.5 at 260K tokens.

Do both Claude Opus 5 and Mercury 2.5 support vision?

▼

Claude Opus 5 supports vision/image input, but Mercury 2.5 does not.

What are the key differences between Claude Opus 5 and Mercury 2.5?

▼

Key differences: Mercury 2.5 is significantly cheaper; only Claude Opus 5 supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Opus 5 and Mercury 2.5 for free on idapt.app to see which performs better for your specific needs.

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