[Workers AI] Add NVIDIA Nemotron 3 Super model

[mchenco]

Summary

• Add @cf/nvidia/nemotron-3-120b-a12b (NVIDIA Nemotron 3 Super) model JSON fetched from the Workers AI API
• Add changelog entry at /changelog/post/2026-03-11-nemotron-3-super-workers-ai/
• Add release notes entry to workers-ai.yaml
• Add pricing row: $0.50/M input tokens, $1.50/M output tokens (45455 / 136364 neurons)

Files changed

• src/content/workers-ai-models/nemotron-3-120b-a12b.json — new model definition (fetched via node bin/fetch-ai-models.js)
• src/content/changelog/workers-ai/2026-03-11-nemotron-3-super-workers-ai.mdx — changelog entry
• src/content/release-notes/workers-ai.yaml — release notes entry
• src/content/docs/workers-ai/platform/pricing.mdx — pricing table row

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/pcx-technical-writing
/src/content/docs/workers-ai/	@rita3ko, @craigsdennis, @mchenco, @zeke, @superhighfives, @bfirsh, @mattrothenberg, @ethulia, @cloudflare/pcx-technical-writing
/src/content/release-notes/workers-ai.yaml	@kathayl, @mchenco, @zeke, @superhighfives, @bfirsh, @mattrothenberg, @ethulia, @cloudflare/pcx-technical-writing
/src/content/workers-ai-models/	@craigsdennis, @cloudflare/content-engineering, @cloudflare/pcx-technical-writing, @kodster28

[github-actions]

Preview URL: https://cb9954f3.preview.developers.cloudflare.com
Preview Branch URL: https://mchen-nemotron-3-120b-a12b.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/2026-03-11-nemotron-3-super-workers-ai/	https://mchen-nemotron-3-120b-a12b.preview.developers.cloudflare.com/changelog/2026-03-11-nemotron-3-super-workers-ai/
https://developers.cloudflare.com/workers-ai/platform/pricing/	https://mchen-nemotron-3-120b-a12b.preview.developers.cloudflare.com/workers-ai/platform/pricing/