Coding work
Code generation, repair, and software-engineering tasks
GLM-5.1
GLM-5.1 leads on the public coding lane, 51.5 to 43.4, with Supported evidence for both models, although the 90% intervals overlap.
Confidence: limited
Gemini 3.1 Pro vs GLM-5.1
Updated September 23, 2026. Rank says Gemini 3.1 Pro is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
Both of these models will change. Get the price, version and retirement notices for the pair, each with its source. Follow model changes
Share or export
Decision reading
Gemini 3.1 Pro has the higher public score estimate, 64.97 versus 57.71, but the 90% score intervals overlap. Treat that as a lead, not a settled winner. 12 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 12
- Gemini 3.1 Pro only
- 16
- GLM-5.1 only
- 14
- Like-for-like categories
- 2 / 8
Estimated: Gemini 3.1 Pro · Supported: GLM-5.1How the comparison works
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Long documents
Prompts that approach the documented context limit
Gemini 3.1 Pro
Gemini 3.1 Pro has the larger documented context window.
Confidence: documentedChat turn cost
1K fresh input + 500 output tokens
GLM-5.1
GLM-5.1 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
GLM-5.1
GLM-5.1 has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
GLM-5.1 is scored on Estimated evidence for agentic, so the reading is directional rather than like-for-like.
Confidence: limitedCache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. GLM-5.1 does not fit this workload in one request. GLM-5.1 has no published cached-input rate, so cached tokens use its listed input rate.
Confidence: rate-fallback
Which one for a specific job
Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.
The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.
43.4Gemini 3.1 Pro51.5GLM-5.1
Like-for-like · BenchAlign v5.6
GLM-5.1 leads the like-for-like coding row, although the 90% intervals overlap.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Same basis rules as the category table below
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
16 Gemini 3.1 Pro only
12 Shared
14 GLM-5.1 only
1 category rests on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
LiveCodeBench (Vals)Coding
Normalized gap 7.1Gemini 3.1 Pro:88.5%GLM-5.1:81.4%FrontierMath v2 (Tier 4)Math
Normalized gap 4.2Gemini 3.1 Pro:16.700%GLM-5.1:12.500%MMLU-Pro (Vals)Knowledge
Normalized gap 4.1Gemini 3.1 Pro:91.0%GLM-5.1:86.9%FrontierMath v2 (Tiers 1-3)Math
Normalized gap 3.5Gemini 3.1 Pro:36.900%GLM-5.1:33.448%
Bars run 0–100 on each benchmark’s normalized display scale
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign v5.6 lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
Coding
Like-for-like- Gemini 3.1 Pro
- 43.4
- Supported · #53/135
- GLM-5.1
- 51.5
- Supported · #36/135
- Basis
- BenchAlign v5.6 lane · 5 vs 7 public rows
- Reading
- GLM-5.1 leads · intervals overlap
Knowledge
Like-for-like- Gemini 3.1 Pro
- 64.2
- Supported · #23/160
- GLM-5.1
- 50.2
- Supported · #54/160
- Basis
- BenchAlign v5.6 lane · 6 vs 4 public rows
- Reading
- Gemini 3.1 Pro leads · intervals overlap
Agentic
Directional only- Gemini 3.1 Pro
- 38.9
- Supported · #47/105
- GLM-5.1
- 42.1
- Estimated · #43/105
- Basis
- BenchAlign v5.6 lane · 6 vs 9 public rows
- Reading
- Directional only
Reasoning
Not comparable- Gemini 3.1 Pro
- 50.7
- Unranked · 2 rankable rows
- GLM-5.1
- 71.7
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Gemini 3.1 Pro
- 79.1
- #13/50
- GLM-5.1
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 3.1 Pro
- Not ranked
- GLM-5.1
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Gemini 3.1 Pro
- Not ranked
- GLM-5.1
- 92.4
- #4/124
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Gemini 3.1 Pro
- 54.2
- Unranked · 2 rankable rows
- GLM-5.1
- 63.8
- #3/7
- Basis
- Provisional lane · 2 vs 4 weighted rows
- Reading
- Not comparable
| Category | Gemini 3.1 Pro | GLM-5.1 | Basis | Reading |
|---|---|---|---|---|
| Coding | 43.4Supported · #53/135 | 51.5Supported · #36/135 | Like-for-likeBenchAlign v5.6 lane · 5 vs 7 public rows | GLM-5.1 leads · intervals overlap |
| Knowledge | 64.2Supported · #23/160 | 50.2Supported · #54/160 | Like-for-likeBenchAlign v5.6 lane · 6 vs 4 public rows | Gemini 3.1 Pro leads · intervals overlap |
| Agentic | 38.9Supported · #47/105 | 42.1Estimated · #43/105 | Directional onlyBenchAlign v5.6 lane · 6 vs 9 public rows | Directional only |
| Reasoning | 50.7Unranked · 2 rankable rows | 71.7Unranked · 2 rankable rows | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Multimodal | 79.1#13/50 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | Not ranked | 92.4#4/124 | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | 54.2Unranked · 2 rankable rows | 63.8#3/7 | Not comparableProvisional lane · 2 vs 4 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.6) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Supported evidence per lane · bars run 0–100Methodology
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Gemini 3.1 Pro
- $0.008
- Fits in one request
- GLM-5.1
- $0.0036
- Fits in one request
GLM-5.1 has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 3.1 Pro
- $0.136
- Fits in one request
- GLM-5.1
- $0.0832
- Fits in one request
GLM-5.1 has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Gemini 3.1 Pro
- $0.2
- Fits in one request
- GLM-5.1
- $0.352
- Does not fit in one request
- Cached input priced at the published list-input rate
GLM-5.1 does not fit this workload in one request. GLM-5.1 has no published cached-input rate, so cached tokens use its listed input rate.
Cached input falls back to the list input rate only where a cached rate is unpublished
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGemini 3.1 ProGLM-5.1
Context window
Maximum documented context; output-token limits may be lower.
Gemini 3.1 Pro
GLM-5.1
203K
API model ID
Gemini 3.1 Pro
gemini-3.1-pro-preview
Google Gemini 3.1 Pro Preview model documentationGLM-5.1
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Gemini 3.1 Pro
$0.2 per 1M cached input tokens
Google Gemini API pricingGLM-5.1
Not published
Documented inputs
Gemini 3.1 Pro
text, image, video, audio, pdf
Google Gemini 3.1 Pro Preview model documentationGLM-5.1
Not sourced
Documented outputs
Gemini 3.1 Pro
GLM-5.1
Not sourced
Provider availability
Gemini 3.1 Pro
Preview · Gemini API, Google AI Studio
Google Gemini model catalogGLM-5.1
Not sourced
Reasoning profile
Gemini 3.1 Pro
Reasoning
GLM-5.1
Reasoning
Weight access
Gemini 3.1 Pro
Proprietary
GLM-5.1
Open Weight
License
Gemini 3.1 Pro
Proprietary
GLM-5.1
Open Weight
Release date
Gemini 3.1 Pro
2026-02-19
GLM-5.1
2026-04-07
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- Gemini 3.1 Pro has the higher public score estimate, 64.97 versus 57.71, but the 90% score intervals overlap.
- Workload cost
- Repository review: $0.136 vs $0.0832. Cache-heavy agent loop: $0.2 vs $0.352.
- Context tradeoff
- Gemini 3.1 Pro has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Gemini 3.1 Pro or GLM-5.1?
Gemini 3.1 Pro has the higher public score estimate, 64.97 versus 57.71, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.
Which is better for coding, Gemini 3.1 Pro or GLM-5.1?
GLM-5.1 leads the public coding lane, 51.5 to 43.4, with Supported evidence for both models, although the 90% intervals overlap.
Which is better for agentic tasks, Gemini 3.1 Pro or GLM-5.1?
GLM-5.1 scores higher for agentic tasks on the public lane, 42.1 to 38.9. GLM-5.1 is scored on Estimated evidence for agentic tasks, so the reading is directional rather than like-for-like. BenchLM does not name a winner for agentic tasks from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which costs less, Gemini 3.1 Pro or GLM-5.1?
For the stated presets, chat costs $0.008 on Gemini 3.1 Pro and $0.0036 on GLM-5.1; repository review costs $0.136 and $0.0832; the cache-heavy agent loop costs $0.2 and $0.352. GLM-5.1 does not fit this workload in one request. GLM-5.1 has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, Gemini 3.1 Pro or GLM-5.1?
Gemini 3.1 Pro has the larger documented context window: 1M, compared with 203K.
Self-host vs API cost
Estimates at 50,000 req/day · 1000 tokens/req average.
Gemini 3.1 Pro
API / mo$10,500
Self-host / moNot listed
Break-even—
Proprietary model — self-hosting not applicable.
GLM-5.1
API / mo$4,350
Self-host / mo$18,221
Break-even264M/day
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence42 rows
Agentic
Claw-Eval
Shared sourceGemini 3.1 Pro57.8%GLM-5.162.3%GLM-5.1 leads this result
DeepSearchQA
Gemini 3.1 Pro69.7%SourceGLM-5.1—Not directly comparable
τ²-bench results
Gemini 3.1 Pro95.6%SourceGLM-5.1—Not directly comparable
Gert Labs
Shared sourceGemini 3.1 Pro56.87%GLM-5.160.11%GLM-5.1 leads this result
ResearchClawBench
Shared sourceGemini 3.1 Pro13.3%GLM-5.118.2%GLM-5.1 leads this result
Terminal-Bench 2.1 (Vals)
Gemini 3.1 Pro70.8%SourceGLM-5.156.9%SourceGemini 3.1 Pro leads this result
Terminal-Bench 2.0
Gemini 3.1 Pro—GLM-5.163.5%SourceNot directly comparable
BrowseComp
Gemini 3.1 Pro—GLM-5.168%SourceNot directly comparable
τ³-bench results
Gemini 3.1 Pro—GLM-5.170.6%SourceNot directly comparable
MCP Atlas
Gemini 3.1 Pro—GLM-5.171.8%SourceNot directly comparable
CyberGym
Gemini 3.1 Pro—GLM-5.168.7%SourceNot directly comparable
Coding
LiveCodeBench Pro
Gemini 3.1 Pro82.9%SourceGLM-5.1—Not directly comparable
React Native Evals
Gemini 3.1 Pro78.9%SourceGLM-5.1—Not directly comparable
Vibe Code Bench
Shared sourceGemini 3.1 Pro32.03%GLM-5.131.46%Gemini 3.1 Pro leads this result
LiveCodeBench (Vals)
Gemini 3.1 Pro88.5%SourceGLM-5.181.4%SourceGemini 3.1 Pro leads this result
SWE-bench (Vals)
Gemini 3.1 Pro78.8%SourceGLM-5.176.4%SourceGemini 3.1 Pro leads this result
SWE-bench Pro
Gemini 3.1 Pro—GLM-5.158.4%SourceNot directly comparable
NL2Repo
Gemini 3.1 Pro—GLM-5.142.7%SourceNot directly comparable
SWE-Rebench
Gemini 3.1 Pro—GLM-5.162.7%SourceNot directly comparable
OpenHarmony Bench
Gemini 3.1 Pro—GLM-5.152.3%SourceNot directly comparable
Reasoning
Multimodal
MMMU-Pro
Gemini 3.1 Pro83.9%SourceGLM-5.1—Not directly comparable
CharXiv
Gemini 3.1 Pro80.2%SourceGLM-5.1—Not directly comparable
ERQA
Gemini 3.1 Pro69.4%SourceGLM-5.1—Not directly comparable
SimpleVQA
Gemini 3.1 Pro72.4%SourceGLM-5.1—Not directly comparable
ScreenSpot Pro
Gemini 3.1 Pro84.4%SourceGLM-5.1—Not directly comparable
ZeroBench
Gemini 3.1 Pro29.0%SourceGLM-5.1—Not directly comparable
MedXpertQA (MM)
Gemini 3.1 Pro81.3%SourceGLM-5.1—Not directly comparable
Knowledge
GPQA-D
Gemini 3.1 Pro94.3%SourceGLM-5.186.2%SourceGemini 3.1 Pro leads this result
HLE w/o tools
Gemini 3.1 Pro45.4%SourceGLM-5.1—Not directly comparable
HealthBench Hard
Gemini 3.1 Pro20.6%SourceGLM-5.1—Not directly comparable
MedXpertQA (Text)
Gemini 3.1 Pro71.5%SourceGLM-5.1—Not directly comparable
GPQA Diamond (Vals)
Gemini 3.1 Pro95.5%SourceGLM-5.184.5%SourceGemini 3.1 Pro leads this result
MMLU-Pro (Vals)
Gemini 3.1 Pro91.0%SourceGLM-5.186.9%SourceGemini 3.1 Pro leads this result
HLE
Gemini 3.1 Pro—GLM-5.152.3%SourceNot directly comparable
Math
FrontierMath v2 (Tiers 1-3)
Shared sourceGemini 3.1 Pro36.900%GLM-5.133.448%Gemini 3.1 Pro leads this result
FrontierMath v2 (Tier 4)
Shared sourceGemini 3.1 Pro16.700%GLM-5.112.500%Gemini 3.1 Pro leads this result
AIME26
Gemini 3.1 Pro—GLM-5.195.3%SourceNot directly comparable
HMMT Nov 2025
Gemini 3.1 Pro—GLM-5.194.0%SourceNot directly comparable
HMMT Feb 2026
Gemini 3.1 Pro—GLM-5.182.6%SourceNot directly comparable
MMAnswerBench
Gemini 3.1 Pro—GLM-5.183.8%SourceNot directly comparable
42 public results · 12 shared
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Last updated September 23, 2026