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GLM-5.2 vs Claude Opus 4.8
Of the 2 public leaderboards that rate both, GLM-5.2 scores higher on 1 and Claude Opus 4.8 on 1. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GLM-5.2 is at 31.4 and Claude Opus 4.8 at 30.4 (out of 100). On each maker's API, GLM-5.2 costs $1.40 / $4.40 per 1M tokens (input / output) and Claude Opus 4.8 $5 / $25.
Scores as published by each board; table composed November 8, 2026.
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Leaderboard by leaderboard
| Board | GLM-5.2 | Claude Opus 4.8 | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,606.4 | 1,555.9 | GLM-5.2 |
| SimpleBench AVG@5 % (private set) | 58.8 | 64.8 | Claude Opus 4.8 |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, GLM-5.2 is at 28.3 (#35 of 45) and Claude Opus 4.8 at 52.3 (#18). Claude Opus 4.8 scores higher on both coding boards that rate them.
| Coding board | GLM-5.2 | Claude Opus 4.8 |
|---|---|---|
| LMArena · Coding | 1,487.8 | 1,490.8 |
| Vals Vibe Code Bench | 64 | 82.7 |
GLM-5.2 at a glance
- Developer
- Zhipu AI
- Status
- Live since June 16, 2026
- API price
- $1.40 input / $4.40 output per 1M tokens · Z.AI, glm-5.2
- Context window
- 1M tokens
Live — $0.40/$2.52 per 1M · no longer the current shipped GLM: 5.3 landed Aug 14 and 5.3 Flash Aug 26.
Claude Opus 4.8 at a glance
- Developer
- Anthropic
- Status
- Live since May 27, 2026
- API price
- $5 input / $25 output per 1M tokens · Anthropic, claude-opus-4-8
- Context window
- 1M tokens
Live.
GLM-5.2 vs Claude Opus 4.8: quick answers
Which is better, GLM-5.2 or Claude Opus 4.8?
It depends on what you measure. Of the 2 public leaderboards that rate both, GLM-5.2 scores higher on 1 and Claude Opus 4.8 on 1. GLM-5.2's widest lead is on LMArena; Claude Opus 4.8's widest lead is on SimpleBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GLM-5.2 is at 31.4 and Claude Opus 4.8 at 30.4 (out of 100).
Which is newer, GLM-5.2 or Claude Opus 4.8?
GLM-5.2. It went live on June 16, 2026, 20 days after Claude Opus 4.8 (May 27, 2026).
Which is cheaper, GLM-5.2 or Claude Opus 4.8?
GLM-5.2 is cheaper on both input and output. On each vendor's own API, GLM-5.2 is $1.40 input / $4.40 output per million tokens and Claude Opus 4.8 is $5 input / $25 output per million tokens. Prices as published in the models.dev catalog, as of 2026-11-08.
Which has the bigger context window, GLM-5.2 or Claude Opus 4.8?
Neither. Both take 1M tokens.
How do GLM-5.2 and Claude Opus 4.8 compare for coding?
On the ArtificialWatch coding index, GLM-5.2 is at 28.3 (#35 of 45) and Claude Opus 4.8 at 52.3 (#18). Claude Opus 4.8 scores higher on both coding boards that rate them.
Who makes GLM-5.2 and Claude Opus 4.8?
GLM-5.2 is from Zhipu AI; Claude Opus 4.8 is from Anthropic.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 8, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · what a workload costs on each · the wire