Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Model details →Anthropic: Claude Opus 5.5 vs Z.ai: GLM 5.2
Z.ai: GLM 5.2 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level software engineering,...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Opus 5.5 | Z.ai: GLM 5.2 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1.0M | 🏆 Z.ai: GLM 5.2 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $4.00 | $0.65 | 🏆 Z.ai: GLM 5.2 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $20.00 | $2.04 | 🏆 Z.ai: GLM 5.2 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 Anthropic: Claude Opus 5.5 |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Opus 5.5 better than Z.ai: GLM 5.2?
Z.ai: GLM 5.2 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Opus 5.5 and Z.ai: GLM 5.2?
Input: $4.00 vs $0.65 per 1M tokens. Output: $20.00 vs $2.04 per 1M tokens.
What context windows do Anthropic: Claude Opus 5.5 and Z.ai: GLM 5.2 support?
Anthropic: Claude Opus 5.5 supports up to 1M tokens. Z.ai: GLM 5.2 supports up to 1.0M tokens.
Do both Anthropic: Claude Opus 5.5 and Z.ai: GLM 5.2 support tool calling?
Anthropic: Claude Opus 5.5: yes. Z.ai: GLM 5.2: yes.