Model comparison
GLM-5 (Reasoning) vs GPT-5.5 Pro
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GLM-5 (Reasoning) #52 (Estimated); GPT-5.5 Pro #38 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GLM-5 (Reasoning) and GPT-5.5 Pro share 0 comparable benchmark results. 0 of 8 categories are comparable. 2 results are unique to GLM-5 (Reasoning); 7 to GPT-5.5 Pro.
Updated July 22, 2026- Shared results
- 0
- GLM-5 (Reasoning) only
- 2
- GPT-5.5 Pro only
- 7
- Comparable categories
- 0 / 8
Benchmark data for GLM-5 (Reasoning) and GPT-5.5 Pro is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 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.
GPT-5.5 Pro is priced at $30.00 input / $180.00 output per 1M tokens, versus $1.00 input / $3.20 output per 1M tokens for GLM-5 (Reasoning). GPT-5.5 Pro has the larger context window at 1M, compared with 200K for GLM-5 (Reasoning).
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GLM-5 (Reasoning) | GPT-5.5 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GLM-5 (Reasoning)$1 input / $3.2 output | GPT-5.5 Pro$30 input / $180 output | GLM-5 (Reasoning) has the lower combined listed price. |
| Generation speedtokens per second | GLM-5 (Reasoning)Not available | GPT-5.5 ProNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GLM-5 (Reasoning)Not available | GPT-5.5 ProNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GLM-5 (Reasoning)200K | GPT-5.5 Pro1M | GPT-5.5 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | GLM-5 (Reasoning) | GPT-5.5 Pro | Result |
|---|---|---|---|
| BrowseCompSource | — | 90.1% | Not comparable |
Coding1 benchmarks
| Benchmark | GLM-5 (Reasoning) | GPT-5.5 Pro | Result |
|---|---|---|---|
| Vibe Code BenchSource | 23.36% | — | Not comparable |
Reasoning1 benchmarks
| Benchmark | GLM-5 (Reasoning) | GPT-5.5 Pro | Result |
|---|---|---|---|
| CritPtSource | — | 30.6% | Not comparable |
Knowledge2 benchmarks
Math3 benchmarks
Multimodal1 benchmarks
| Benchmark | GLM-5 (Reasoning) | GPT-5.5 Pro | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1278 | — | Not comparable |
Frequently Asked Questions (3)
Can I compare GLM-5 (Reasoning) and GPT-5.5 Pro 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-5 (Reasoning) and GPT-5.5 Pro today?
GLM-5 (Reasoning): $1.00 input / $3.20 output per 1M tokens GPT-5.5 Pro: $30.00 input / $180.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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