GLM-5.3 vs Claude Opus 4.8
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GLM-5.3
B
Claude Opus 4.8
- ProviderZ.aiAnthropic
- Rank#14Higher rank#21
- TierSHigher tierA
- Score86.3Higher score84.7
- PriceOpen weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier$5 / $25 per 1M tokens (in/out)
- TaglineZ.ai's open-weight flagship with a 1M-token context window for long-horizon work.An earlier Anthropic Opus release (May 2026), strong across coding, reasoning and long-context knowledge work; since followed by Opus 5 and 5.5.
| Attribute | GLM-5.3 | Claude Opus 4.8 |
|---|---|---|
| Provider | Z.ai | Anthropic |
| Rank | #14Higher rank | #21 |
| Tier | SHigher tier | A |
| Score | 86.3Higher score | 84.7 |
| Price | Open weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.aiLower price tier | $5 / $25 per 1M tokens (in/out) |
| Tagline | Z.ai's open-weight flagship with a 1M-token context window for long-horizon work. | An earlier Anthropic Opus release (May 2026), strong across coding, reasoning and long-context knowledge work; since followed by Opus 5 and 5.5. |