claude-opus-4-8 vs glm-5.3
Side-by-side comparison of claude-opus-4-8 and glm-5.3: benchmarks, pricing, context window and capabilities. Both are accessible through Requesty's unified API. glm-5.3 outperforms claude-opus-4-8 on 3 of 5 shared benchmarks.
claude-opus-4-8
Input / 1M
$5.00
Output / 1M
$25.00
Context
1M
Model ID
anthropic/claude-opus-4-8
glm-5.3
Input / 1M
$1.40
Output / 1M
$4.40
Context
1M
Model ID
zai/glm-5.3
Benchmark comparison
Intelligence Indexreasoning
claude-opus-4-847.8%
glm-5.348.6%
Coding Indexcoding
claude-opus-4-874.3%
glm-5.374.8%
GPQA Diamondreasoning
claude-opus-4-892.0%
glm-5.391.7%
Terminal-Bench Hardagentic
claude-opus-4-858.3%
glm-5.3N/A
τ²-Benchagentic
claude-opus-4-894.4%
glm-5.3N/A
SciCodecoding
claude-opus-4-854.4%
glm-5.359.0%
Humanity's Last Examreasoning
claude-opus-4-848.7%
glm-5.342.3%
Scores sourced from official model cards, Artificial Analysis, and public leaderboards. Benchmarks measure specific skills and don't capture every aspect of model quality.
Pricing & specifications
| claude-opus-4-8 | glm-5.3 | |
|---|---|---|
| Input price / 1M | $5.00 | $1.40 |
| Output price / 1M | $25.00 | $4.40 |
| Context window | 1M tokens | 1M tokens |
| Max output | 128K tokens | 128K tokens |
| Vision input | Yes | Yes |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Computer use | Yes | N/A |
| Provider | Anthropic PBC | Z.ai |
Questions people ask
Is claude-opus-4-8 better than glm-5.3?
glm-5.3 outperforms claude-opus-4-8 on 3 of 5 shared benchmarks. See the benchmark comparison above for specifics: claude-opus-4-8 and glm-5.3 have different strengths across reasoning, coding, math and multimodal tasks.
Which is cheaper, claude-opus-4-8 or glm-5.3?
glm-5.3 is cheaper. claude-opus-4-8 costs $5.00/$25.00 per 1M input/output tokens, while glm-5.3 costs $1.40/$4.40.
Can I use claude-opus-4-8 and glm-5.3 through the same API?
Yes. Requesty provides a single OpenAI-compatible API that routes to both. Change just the "model" parameter to switch between "anthropic/claude-opus-4-8" and "zai/glm-5.3", no other code changes needed.
What are the context windows?
claude-opus-4-8 supports up to 1M tokens of context. glm-5.3 supports up to 1M tokens. Longer context means you can feed larger documents or codebases in a single prompt, though quality often degrades past 128K for most models.
Switch between claude-opus-4-8 and glm-5.3 with one line of code
Requesty provides a single OpenAI-compatible API for 600+ models. Change the model parameter, not your code.