Model comparison
GLM 5.2 vs GPT OSS 20B
Price history, scores and specs for both models, line by line. Every value shows where it came from and when we last confirmed it.
Accounts
GLM 5.2
Flagship GLM model for hybrid reasoning, coding, and agentic engineering.
Accounts
GPT OSS 20B
Open-weight GPT model for self-hosted reasoning and instruction-following workloads.
Quick take
Where each one leads
- GLM 5.2 costs less to send text to: $0.0070 per million tokens, against $0.030 per million tokens for GPT OSS 20B.
- GPT OSS 20B costs less per word it writes: $0.130 per million tokens, against $6.80 per million tokens for GLM 5.2.
- GLM 5.2 reads more at once: 1,048,576 tokens, against 131,072 tokens.
- GLM 5.2 scores higher on the Artificial Analysis Intelligence Index: 33.7 to 10.
- GLM 5.2 scores higher on the Artificial Analysis Coding Index: 68.8 to 20.7.
- More people run GLM 5.2 through OpenRouter than GPT OSS 20B right now.
Each line comes from a checked value in the tables below. Pick on your workload: price and usage matter for high volume, context and scores for long documents and agent loops.
Price history
Prices side by side, day by day
- GLM 5.2
- GPT OSS 20B
- GLM 5.2
- GPT OSS 20B
Prices are the listed OpenRouter base rates in US dollars. A day we could not confirm is left out of the line, never filled in.
Price
What each one costs now
| Measure | GLM 5.2 | GPT OSS 20B |
|---|---|---|
| Input price | $0.0070 per million tokens Leads | $0.030 per million tokens |
| Output price | $6.80 per million tokens | $0.130 per million tokens Leads |
Scores
Benchmarks, with source and date
| Measure | GLM 5.2 | GPT OSS 20B |
|---|---|---|
| Artificial Analysis Intelligence Index | 33.7 Leads | 10 |
| Artificial Analysis Coding Index | 68.8 Leads | 20.7 |
| Artificial Analysis Agentic Index | 38.4 Leads | 1.2 |
| LMArena text rating (Elo) | 1,469 Leads | 1,288 |
| LMArena web development rating (Elo) | 1,608 | Not checked yet |
| Design Arena rating (Elo) | 1,289 Leads | 933 |
Specs
Context, modalities and tool use
| Measure | GLM 5.2 | GPT OSS 20B |
|---|---|---|
| Context window | 1,048,576 tokens Leads | 131,072 tokens |
| Reads | Text | Text |
| Writes | Text | Text |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
| Open weights | Yes | Yes |
| Listed since | 16 June 2026 | 5 Aug 2025 |
Usage
How much each one is used
| Measure | GLM 5.2 | GPT OSS 20B |
|---|---|---|
| Tokens served on OpenRouter in a day | 166.2B Leads (for 10 Nov 2026) | 25.2B (for 10 Nov 2026) |
| Requests on OpenRouter in a day | 5.4M (for 10 Nov 2026) | 6.6M Leads (for 10 Nov 2026) |
| Tool calls on OpenRouter in a day | 2.2M Leads (for 10 Nov 2026) | 664.4K (for 10 Nov 2026) |
| Token usage, last 7 days | Down 1% on the week before Leads (for 10 Nov 2026) | Down 18% on the week before (for 10 Nov 2026) |
- GLM 5.2
- GPT OSS 20B
How this works
One link, either order
This link stays the same whichever order you name the two models in, so you can share it as it is. A line appears only when at least one model has a value we confirmed from a source; values we have not confirmed are left out, never guessed. To add a third record of any type, use the open comparison. Read how we check facts.