Remy Reference/models/Claude 4.5 Opus

Claude 4.5 Opus

Claude 4.5 Opus, a language model from Anthropic.

modelOverride: { model: "claude-4-5-opus" }

AAnthropic·Released November 2025

Pricing

Input: $5.00 / 1M
Output: $25.00 / 1M
Cached input: $0.50 / 1M
Cached input: $6.25 / 1M
Cached input: $10.00 / 1M

Specifications

Context window: 200,000 tokens
Max output: 64,000 tokens
Released: November 2025
Model string: claude-opus-4-5-20251101
Capabilities: VisionLarge contextToolsReasoningMCP

Parameters

Model options, passed in modelOverride.config.

Parameter	Type	Default	Range / options
`reasoning` When enabled, the model will explain its thought process step-by-step before providing a final answer. This can help users understand how the model arrived at its conclusions, but may result in longer responses.	Select	false	falsetrue
`reasoningSize` You can allocate a larger thinking budget to support more thorough reasoning. Must be less than max. response size	Number	—	1024–32000
`tools`	Tools	—	—
`mcpServers`	MCP servers	—	—

Use this model

await mindstudio.generateText({
  message: "...",
  modelOverride: {
    model: "claude-4-5-opus",
    config: {
      reasoning: "false",
    },
  },
});