feat: add GLM-4.7-Flash and FlashX models

[rcogal]

Summary

• Add GLM-4.7-FlashX model (lightweight, high-speed, $0.07/1M input, $0.4/1M output)
• Add GLM-4.7-Flash model (free, lightweight)

Test plan

• Verified both models work via direct API call to Z.ai
• Test via gateway endpoint after deployment

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features
  • Added two new GLM-4.7 model variants: glm-4.7-flashx (paid) and glm-4.7-flash (free). Both offer full feature support — streaming, reasoning, vision, tool use, and structured output — with the free variant provided at zero pricing.

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[coderabbitai]

Walkthrough

Adds two GLM-4.7 variants (glm-4.7-flashx and glm-4.7-flash) to the zaiModels registry with metadata and zai provider entries; the flash variant has zero pricing while flashx includes paid pricing.

Changes

Cohort / File(s)	Summary
New GLM-4.7 Flash Variants packages/models/src/models/zai.ts	Added glm-4.7-flashx and glm-4.7-flash entries to zaiModels with full metadata and a single zai provider object (pricing, cachedInputPrice, requestPrice, discount, contextSize, maxOutput, capability flags: streaming, reasoning, vision, tools, jsonOutput).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• feat(models): add GLM-4.7 #1346: Adds GLM-4.7 entries to packages/models/src/models/zai.ts (overlapping model family).
• feat(models): add Cerebras GLM-4.7 #1415: Adds/updates GLM-4.7 provider configurations in the same zaiModels registry.
• feat(models): provide 10% off zai models #1106: Modifies provider-level pricing/discount fields in zaiModels, similar structure to the new entries.

Suggested reviewers

• smakosh

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: add GLM-4.7-Flash and FlashX models' directly and clearly summarizes the main change: adding two new GLM model variants to the codebase.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

• 📝 Generate docstrings

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[rcogal]

Tested the new models, and it works on LLM current design

[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@packages/models/src/models/zai.ts`:
- Around line 263-286: The Z.ai provider entry for model id "glm-4.7-flashx" is
missing the discount field; update the providers array entry (providerId "zai",
modelName "glm-4.7-flashx") to include discount: 0.1 placed after outputPrice:
0.4 / 1e6 so it matches other paid Z.ai direct models and ensures downstream
pricing uses the intended 10% discount.