Model comparison
GLM-4.5-Air vs GPT-4.1 nano
Head-to-head evidence from 12 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GLM-4.5-Air #140 (Supported); GPT-4.1 nano #170 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GLM-4.5-Air and GPT-4.1 nano share 12 comparable benchmark results. 0 of 8 categories are comparable. 0 results are unique to GLM-4.5-Air; 9 to GPT-4.1 nano.
Updated July 24, 2026- Shared results
- 12
- GLM-4.5-Air only
- 0
- GPT-4.1 nano only
- 9
- Comparable categories
- 0 / 8
Benchmark data for GLM-4.5-Air and GPT-4.1 nano is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 6 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GLM-4.5-Air is priced at $0.20 input / $1.10 output per 1M tokens, versus $0.10 input / $0.40 output per 1M tokens for GPT-4.1 nano. GPT-4.1 nano has the larger context window at 1M, compared with 128K for GLM-4.5-Air.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GLM-4.5-Air | Δ | GPT-4.1 nano |
|---|---|---|---|
| Knowledge | GLM-4.5-AirNot measured | MarginNo overlap | GPT-4.1 nano50.3 |
| Math | GLM-4.5-AirNot measured | MarginNo overlap | GPT-4.1 nano1.0 |
| Inst. Following | GLM-4.5-AirNot measured | MarginNo overlap | GPT-4.1 nano83.2 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GLM-4.5-Air | GPT-4.1 nano | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GLM-4.5-Air$0.2 input / $1.1 output | GPT-4.1 nano$0.1 input / $0.4 output | GPT-4.1 nano has the lower combined listed price. |
| Generation speedtokens per second | GLM-4.5-Air106 tok/s | GPT-4.1 nano181 tok/s | GPT-4.1 nano has the higher measured throughput. |
| First-answer latencyseconds to first token | GLM-4.5-Air1.18 s | GPT-4.1 nano0.63 s | GPT-4.1 nano reaches the first token sooner. |
| Context windowmaximum listed tokens | GLM-4.5-Air128K | GPT-4.1 nano1M | GPT-4.1 nano lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | GLM-4.5-Air | GPT-4.1 nano | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 16.5% | 9.6% | GLM-4.5-Air leads |
| AA-GPQA DiamondSource | 73.3% | 51.2% | GLM-4.5-Air leads |
| AA-HLESource | 6.8% | 3.9% | GLM-4.5-Air leads |
| AA-Omniscience IndexSource | -62.5% | -56.4% | GPT-4.1 nano leads |
| AA-Omniscience AccuracySource | 15.5% | 13.3% | GLM-4.5-Air leads |
| AA-Omniscience Hallucination RateSource | 92.3% | 80.4% | GPT-4.1 nano leads |
| MMLUSource | — | 80.1% | Not comparable |
| GPQASource | — | 50.3% | Not comparable |
Math1 benchmarks
| Benchmark | GLM-4.5-Air | GPT-4.1 nano | Result |
|---|---|---|---|
| FrontierMath v2 (Tiers 1-3)Source | — | 1.034% | Not comparable |
Multimodal2 benchmarks
Frequently Asked Questions (3)
Can I compare GLM-4.5-Air and GPT-4.1 nano on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for GLM-4.5-Air and GPT-4.1 nano today?
GLM-4.5-Air: $0.20 input / $1.10 output per 1M tokens GPT-4.1 nano: $0.10 input / $0.40 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.