Model comparison
GLM-5-Turbo vs GPT-5.1-Codex
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-5-Turbo #24 (Supported); GPT-5.1-Codex #99 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GLM-5-Turbo and GPT-5.1-Codex share 12 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to GLM-5-Turbo; 4 to GPT-5.1-Codex.
Updated July 23, 2026- Shared results
- 12
- GLM-5-Turbo only
- 1
- GPT-5.1-Codex only
- 4
- Comparable categories
- 0 / 8
Benchmark data for GLM-5-Turbo and GPT-5.1-Codex 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.
GPT-5.1-Codex has the larger context window at 400K, compared with 200K for GLM-5-Turbo.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GLM-5-Turbo | GPT-5.1-Codex | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GLM-5-Turbo$1.2 input / $4 output | GPT-5.1-CodexNot available | A complete price comparison is not available. |
| Generation speedtokens per second | GLM-5-TurboNot available | GPT-5.1-CodexNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GLM-5-TurboNot available | GPT-5.1-CodexNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GLM-5-Turbo200K | GPT-5.1-Codex400K | GPT-5.1-Codex lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | GLM-5-Turbo | GPT-5.1-Codex | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 38.1% | 34.7% | GLM-5-Turbo leads |
| AA-GPQA DiamondSource | 84.7% | 86.0% | GPT-5.1-Codex leads |
| AA-HLESource | 25.4% | 23.4% | GLM-5-Turbo leads |
| AA-Omniscience IndexSource | -15.1% | -6.0% | GPT-5.1-Codex leads |
| AA-Omniscience AccuracySource | 29.0% | 39.2% | GPT-5.1-Codex leads |
| AA-Omniscience Hallucination RateSource | 62.2% | 74.4% | GLM-5-Turbo leads |
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | GLM-5-Turbo | GPT-5.1-Codex | Result |
|---|---|---|---|
| AA-IFBenchSource | 73.2% | 70.0% | GLM-5-Turbo leads |
Frequently Asked Questions (3)
Can I compare GLM-5-Turbo and GPT-5.1-Codex 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-Turbo and GPT-5.1-Codex today?
GLM-5-Turbo: $1.20 input / $4.00 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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