Cheaper overall
GPT-5.4 Nano
70% lower blended rate
Higher benchmark scores
GLM 5
leads on 6 of 9 figures
Bigger context window
GPT-5.4 Nano
400,000 vs 204,800 tokens
Cheaper cached input
GPT-5.4 Nano
$0.02 vs $0.20, 90% less
Where each one wins
GPT-5.4 Nano
- Cheaper input tokens $0.20 vs $1.00, 80% less
- Cheaper output tokens $1.25 vs $3.20, 61% less
- Cheaper cached input $0.02 vs $0.20, 90% less
- Cheaper on all four workloads
- Larger context window 400,000 tokens
- Higher instruction following (IFBench) 75.9 vs 72.3
- Higher long-context reasoning (AA-LCR) 76.7 vs 75.7
- Higher physics research reasoning (CritPt) 9.3 vs 2
- Offers Batch and Flex pricing not listed for GLM 5
GLM 5
- Higher graduate-level science (GPQA Diamond) 82 vs 81.7
- Higher expert-exam performance (Humanity's Last Exam) 29.3 vs 28.3
- Higher support-agent performance (ฯยฒ-Bench Telecom) 98.2 vs 76
- Ahead on 3 more benchmark figures
What four workloads cost
One run, and the same run a thousand times.
GPT-5.4 Nano is cheaper on all four workloads, by much the same margin each time โ about 4.3 times, from $0.0008 against $0.0026 on a chat turn to $0.0375 against $0.2048 on a long document.
| Workload | GPT-5.4 Nano | GLM 5 | ร1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0008 | $0.0026 | $0.8250 / $2.60 | GPT-5.4 Nano is 68% cheaper |
| RAG answer 10,000 in / 800 out | $0.0030 | $0.0126 | $3.00 / $12.56 | GPT-5.4 Nano is 76% cheaper |
| Agent loop 32,000 in / 700 out ร 20 calls | $0.0375 | $0.2048 | $37.50 / $204.80 | GPT-5.4 Nano is 82% cheaper |
| Long document 400,000 in / 3,000 out | GLM 5's context window holds 204,800 tokens, so a 400,000-token prompt does not fit. | |||
Price per 1M tokens
Above 272,000 input tokens the rates change, and the new rate applies to the whole request, not just the tokens past that point. It does not change which of the two is cheaper.
| Context band | Price | GPT-5.4 Nano | GLM 5 | Difference |
|---|---|---|---|---|
| Prompts up to 272,000 tokens | Input | $0.20 | $1.00 | GPT-5.4 Nano is 80% cheaper |
| Prompts up to 272,000 tokens | Cached input | $0.02 | $0.20 | GPT-5.4 Nano is 90% cheaper |
| Prompts up to 272,000 tokens | Output | $1.25 | $3.20 | GPT-5.4 Nano is 61% cheaper |
| Prompts over 272,000 tokens | Input | $0.20 | $1.00 | GPT-5.4 Nano is 80% cheaper |
| Prompts over 272,000 tokens | Cached input | $0.02 | $0.20 | GPT-5.4 Nano is 90% cheaper |
| Prompts over 272,000 tokens | Output | $1.25 | $3.20 | GPT-5.4 Nano is 61% cheaper |
Blended: GPT-5.4 Nano $0.4625, GLM 5 $1.55 per 1M โ one rate at 3:1 input to output, for comparing two models at a glance.
GPT-5.4 Nano priced by OpenAI, GLM 5 by Z.ai. Standard tier, pay-as-you-go.
Other pricing tiers
Only GPT-5.4 Nano lists Batch and Flex, at up to 50% off its own standard rate; GLM 5 offers none of them.
Every tier either model sells is here, so this is the whole price sheet. A saving is measured against that model's own standard rate โ how we read tiers.
| Tier | GPT-5.4 Nano | GLM 5 | Cheaper |
|---|---|---|---|
| Batch only on GPT-5.4 Nano | $0.10 in / $0.625 out 50% off Standard | Not offered | — |
| Flex only on GPT-5.4 Nano | $0.10 in / $0.625 out 50% off Standard | Not offered | — |
Benchmarks
They share 9 figures: GPT-5.4 Nano leads on 3, GLM 5 on 6. The widest gap is 22.2 points, on support-agent performance (ฯยฒ-Bench Telecom).
Graduate-level science
GPQA Diamond โ Graduate-level questions in biology, chemistry & physics
GLM 5 ahead by 0.3
Expert-exam performance
Humanity's Last Exam โ Expert-level questions across many academic domains
GLM 5 ahead by 1
Instruction following
IFBench โ Precise following of detailed instructions
GPT-5.4 Nano ahead by 3.6
Support-agent performance
ฯยฒ-Bench Telecom โ Tool-using agent tasks in a telecom support setting
GLM 5 ahead by 22.2
Long-context reasoning
AA-LCR โ Long-context reasoning across large inputs
GPT-5.4 Nano ahead by 1
Command-line work
Terminal-Bench Hard โ Complex command-line and terminal workflows
GLM 5 ahead by 0.8
Physics research reasoning
CritPt โ Unpublished physics research reasoning problems
GPT-5.4 Nano ahead by 7.3
Factual accuracy
Omniscience Accuracy โ Breadth of factual knowledge across domains
GLM 5 ahead by 0.6
Answer reliability
Omniscience Non-Hallucination โ How reliably the model avoids fabricated answers
GLM 5 ahead by 15.8
Each figure is that model's best published run, with the effort level named beside it โ where these scores come from.
Specifications
GPT-5.4 Nano holds 195,200 more input tokens in one request. GPT-5.4 Nano also takes file and image.
| Specification | GPT-5.4 Nano | GLM 5 |
|---|---|---|
| Context window | 400,000 tokens | 204,800 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Takes in | Text, image, file | Text |
| Puts out | Text | Text |
| Knowledge cutoff | 31 Aug 2025 | โ |
| Released | 17 Mar 2026 | 11 Feb 2026 |
| Status | Active | Active |
| Sold by | OpenAI, Perplexity | Z.ai |
FAQs
- Is GPT-5.4 Nano cheaper than GLM 5?
- Yes. A 1,000-token prompt with a 500-token reply costs $0.0008 on GPT-5.4 Nano and $0.0026 on GLM 5, and the same model is cheaper on every workload on this page.
- How much do GPT-5.4 Nano and GLM 5 cost per 1M tokens?
- GPT-5.4 Nano costs $0.20 for input and $1.25 for output. GLM 5 costs $1.00 and $3.20. Standard pay-as-you-go rates, as of 11 Feb 2026.
- Which is better, GPT-5.4 Nano or GLM 5?
- On published benchmarks, GLM 5. It leads on 6 of the 9 figures both models report, including graduate-level science (GPQA Diamond), where it scores 82 against 81.7.
- Does GPT-5.4 Nano or GLM 5 offer batch pricing?
- GPT-5.4 Nano only. Its batch input costs $0.10, 50% off its standard rate, and GLM 5 lists no batch tier at all.
- Does GPT-5.4 Nano or GLM 5 have a bigger context window?
- GPT-5.4 Nano, at 400,000 tokens against 204,800. That is 195,200 more input tokens in a single request.