$ diff claude-opus-5-5 hy4-preview
Claude Opus 5.5 vs Hy4 preview
Values come from Claude Opus 5.5 and Hy4 preview, 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.
AnthropicClaude Opus 5.5
- context
- 1M
- weights
- closed
- $/M in
- $4
- $/M out
- $20
- context
- 1M
- weights
- open
- $/M in
- $0.834
- $/M out
- $2.501
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Input price
- Hy4 preview at $0.834/M against $4/M — 4.8× cheaper to feed.
- Output price
- Hy4 preview at $2.501/M against $20/M — 8.0× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- Hy4 preview publishes weights (Apache-2.0); Claude Opus 5.5 is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Claude Opus 5.5 shipped 25 days after Hy4 preview (2026-09-22 vs 2026-08-28).
Full spec
| Attribute | Claude Opus 5.5 | Hy4 preview |
|---|---|---|
| Developer | Anthropic | Tencent |
| Released | 2026-09-22 | 2026-08-28 |
| Context window | 1M tokens | over 1,000,000 |
| Pricing | $4/M input · $20/M output · cache reads $0.20/M · cache writes $5/M | $0.834/M input · $2.501/M output |
| License | proprietary (API-only; no weight release) | Apache-2.0 |
| Availability | Claude apps, Claude Code, Claude API as `claude-opus-5-5`, Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry | Hugging Face (BF16 + FP8), ModelScope, GitCode, CNB, Tencent Cloud TokenHub, OpenRouter, WorkBuddy, CodeBuddy, Yuanbao, ima |