text model comparison
GLM-5.3-Flash vs Granite 4.2 30B
GLM-5.3-Flash and Granite 4.2 30B are both current text models, from Z.ai and IBM. On Arena Text, GLM-5.3-Flash scores 1475 Elo and Granite 4.2 30B 1340 Elo (Arena, measured October 8, 2026). GLM-5.3-Flash has the larger context window, 1,000,000 vs 128,000 tokens.
Data verified October 13, 2026 · Dataset 2026-10-13
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | GLM-5.3-Flash | Granite 4.2 30B |
|---|---|---|
| Price per 1M input tokens | $0.15 | Not reported |
| Price per 1M output tokens | $0.50 | Not reported |
| Arena Text | 1475 Elo (#21 of 49) (better) | 1340 Elo (#48 of 49) |
| GPQA Diamond | 90.2% (#27 of 40) | Not measured |
| FrontierMath Tiers 1-3 (v2) | 55.8% (#31 of 40) | Not measured |
| Provider | Z.ai | IBM |
| Release date | August 26, 2026 | August 25, 2026 |
| Access | API and open weights | open weights |
| Context window | 1,000,000 tokens | 128,000 tokens |
| Max output | 128,000 tokens | Not reported |
| Input | text, image, video | text |
| Output | text | text |
When to choose each
GLM-5.3-Flash
Best for
- Low-cost coding from screenshots or screen recordings
- Document and research agents on a budget
Watch out for
- Thinking cannot be disabled
- A faster GLM-5.3-FlashX is a separate model id at $0.37 input and $1.25 output per 1M tokens
Granite 4.2 30B
Best for
- Self-hosted enterprise agents that need a permissive licence
Watch out for
- IBM says it is fine-tuned mainly on English instruction data, so other languages may be weaker
- IBM publishes no per-token API price for Granite 4.2
GLM-5.3-Flash vs Granite 4.2 30B FAQ
Which scores higher on independent benchmarks, GLM-5.3-Flash or Granite 4.2 30B?
GLM-5.3-Flash leads on Arena Text, 1475 Elo to 1340 Elo. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, GLM-5.3-Flash or Granite 4.2 30B?
GLM-5.3-Flash has the larger context window, 1,000,000 vs 128,000 tokens.
Can I run GLM-5.3-Flash or Granite 4.2 30B myself?
GLM-5.3-Flash is released as open weights you can run yourself; Granite 4.2 30B is available through its provider's API only.
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Production evaluation
Choosing between GLM-5.3-Flash and Granite 4.2 30B?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty