GLM 5.3 Prime vs GPT Chat Latest
GLM 5.3 Prime costs 3.4x less per output token than GPT Chat Latest ($8.80 vs $30.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $8.80
- Coding
- No data
- Overall
- No data
- Output $/M
- $30.00
GLM 5.3 Prime or GPT Chat Latest: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick GLM 5.3 Prime for output tokens 3.4x cheaper ($8.80 vs $30.00 per million) and a larger context window (1M against 400K tokens).
No benchmark has tested either model yet, so price and context are the only way to compare them.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Long documents
Listed context window
GLM 5.3 Prime
GLM 5.3 Prime takes 1M tokens against 400K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 5.3 Prime
GLM 5.3 Prime $0.0072, GPT Chat Latest $0.020 per turn.
List prices
At a glance
- Coding index
- GLM 5.3 Prime not benchmarked, GPT Chat Latest not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- GLM 5.3 Prime $8.80 against GPT Chat Latest $30.00 per million output tokens, 3.4x apart.
- Context window
- GLM 5.3 Prime takes 1M tokens, GPT Chat Latest 400K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
GLM 5.3 Prime costs less
Repository review
50K input + 3K output tokens
GLM 5.3 Prime costs less
Agent loop
200K input + 10K output tokens
GLM 5.3 Prime costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Z.ai GLM 5.3 Prime | OpenAI GPT Chat Latest |
|---|---|---|
| Maker | Z.ai | OpenAI |
| Weights | No public weights listed | No public weights listed |
| Released | September 23, 2026 | May 5, 2026 |
| Context window | 1M | 400K |
| Input $/Mtok | $2.80 | $5.00 |
| Output $/Mtok | $8.80 | $30.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is GLM 5.3 Prime better than GPT Chat Latest for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GLM 5.3 Prime for output tokens 3.4x cheaper ($8.80 vs $30.00 per million) and a larger context window (1M against 400K tokens).
Which is cheaper, GLM 5.3 Prime or GPT Chat Latest?
GLM 5.3 Prime costs $2.80 per million input tokens and $8.80 per million output tokens; GPT Chat Latest costs $5.00 and $30.00. Cost per solved task is known for neither of them.
Which has the bigger context window, GLM 5.3 Prime or GPT Chat Latest?
GLM 5.3 Prime, with 1M tokens against 400K.
Has any benchmark tested both GLM 5.3 Prime and GPT Chat Latest?
No benchmark has tested either model yet, so price and context are the only way to compare them. Data as of October 22, 2026.