feat: provide docs for IBM model gateway

[FilipZmijewski]

Overview

Provided overview of how to use Model Gateway with langchain IBM

Type of change

Type: Update existing documentation

Related issues/PRs

• GitHub issue:
• Feature PR: feat(community): enable model gateway usage in IBM implementation, apply small fixes langchainjs#9423

• Linear issue:
• Slack thread:

Checklist

• I have read the contributing guidelines
• I have tested my changes locally using docs dev
• All code examples have been tested and work correctly
• I have used root relative paths for internal links
• I have updated navigation in src/docs.json if needed
• I have gotten approval from the relevant reviewers
• (Internal team members only / optional) I have created a preview deployment using the Create Preview Branch workflow

Additional notes

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Project	Deployment	Preview	Comments	Updated (UTC)
reference-docs	Ready	Preview	Comment	Oct 24, 2025 6:47pm