$ diff granite-4-2 claude-opus-5
Granite 4.2 vs Claude Opus 5
Values come from Granite 4.2 and Claude Opus 5, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
IBMGranite 4.2
- context
- 512K
- weights
- open
- $/M in
- —
- $/M out
- —
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
What actually differs
- Context window
- Claude Opus 5 takes 1M against 512K — modestly more room in a single request.
- Weights
- Granite 4.2 publishes weights (Apache 2.0); Claude Opus 5 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Granite 4.2 shipped 32 days after Claude Opus 5 (2026-08-25 vs 2026-07-24).
Full spec
| Attribute | Granite 4.2 | Claude Opus 5 |
|---|---|---|
| Developer | IBM | Anthropic |
| Released | 2026-08-25 | 2026-07-24 |
| Context window | 512K (30B); unknown (3B, 8B) | 1M tokens |
| Pricing | not applicable — open weights, no hosted rate published | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) |
| License | Apache 2.0 | proprietary |
| Availability | Hugging Face, Ollama, GitHub | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork |