Long documents
Prompts that approach the documented context limit
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite has the larger documented context window.
Confidence: documented
Gemini 3.1 Flash-Lite vs GLM-5.1
Updated September 23, 2026. Rank says GLM-5.1 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
GLM-5.1 has the higher public score estimate, 57.71 versus 47.46, but the 90% score intervals overlap. Treat that as a lead, not a settled winner. 7 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 7
- Gemini 3.1 Flash-Lite only
- 1
- GLM-5.1 only
- 19
- Like-for-like categories
- 0 / 8
Estimated: Gemini 3.1 Flash-Lite · 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.
Chat turn cost
1K fresh input + 500 output tokens
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite 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
Gemini 3.1 Flash-Lite
Gemini 3.1 Flash-Lite has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCoding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Gemini 3.1 Flash-Lite is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Gemini 3.1 Flash-Lite and GLM-5.1 are 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.
28.4Gemini 3.1 Flash-Lite51.5GLM-5.1
Directional only · BenchAlign v5.6
GLM-5.1 scores higher, but at least one score rests on Estimated evidence or a different benchmark set. Directional only, no winner.
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.
1 Gemini 3.1 Flash-Lite only
7 Shared
19 GLM-5.1 only
3 categories rest 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 1.3Gemini 3.1 Flash-Lite:80.1%GLM-5.1:81.4%MMLU-Pro (Vals)Knowledge
Normalized gap 0.7Gemini 3.1 Flash-Lite:86.2%GLM-5.1:86.9%
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.
Agentic
Directional only- Gemini 3.1 Flash-Lite
- 27.5
- Estimated · #73/105
- GLM-5.1
- 42.1
- Estimated · #43/105
- Basis
- BenchAlign v5.6 lane · 2 vs 9 public rows
- Reading
- Directional only
Coding
Directional only- Gemini 3.1 Flash-Lite
- 28.4
- Estimated · #100/135
- GLM-5.1
- 51.5
- Supported · #36/135
- Basis
- BenchAlign v5.6 lane · 3 vs 7 public rows
- Reading
- Directional only
Knowledge
Directional only- Gemini 3.1 Flash-Lite
- 44.0
- Estimated · #73/160
- GLM-5.1
- 50.2
- Supported · #54/160
- Basis
- BenchAlign v5.6 lane · 2 vs 4 public rows
- Reading
- Directional only
Reasoning
Not comparable- Gemini 3.1 Flash-Lite
- Not ranked
- GLM-5.1
- 71.7
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Gemini 3.1 Flash-Lite
- 37.4
- Unranked · 1 rankable row
- GLM-5.1
- Not ranked
- Basis
- Provisional lane · 1 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 3.1 Flash-Lite
- 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 Flash-Lite
- 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 Flash-Lite
- Not ranked
- GLM-5.1
- 63.8
- #3/7
- Basis
- Provisional lane · 0 vs 4 weighted rows
- Reading
- Not comparable
| Category | Gemini 3.1 Flash-Lite | GLM-5.1 | Basis | Reading |
|---|---|---|---|---|
| Agentic | 27.5Estimated · #73/105 | 42.1Estimated · #43/105 | Directional onlyBenchAlign v5.6 lane · 2 vs 9 public rows | Directional only |
| Coding | 28.4Estimated · #100/135 | 51.5Supported · #36/135 | Directional onlyBenchAlign v5.6 lane · 3 vs 7 public rows | Directional only |
| Knowledge | 44.0Estimated · #73/160 | 50.2Supported · #54/160 | Directional onlyBenchAlign v5.6 lane · 2 vs 4 public rows | Directional only |
| Reasoning | Not ranked | 71.7Unranked · 2 rankable rows | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 37.4Unranked · 1 rankable row | Not ranked | Not comparableProvisional lane · 1 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 | Not ranked | 63.8#3/7 | Not comparableProvisional lane · 0 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 Flash-Lite
- $0.001
- Fits in one request
- GLM-5.1
- $0.0036
- Fits in one request
Gemini 3.1 Flash-Lite has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 3.1 Flash-Lite
- $0.017
- Fits in one request
- GLM-5.1
- $0.0832
- Fits in one request
Gemini 3.1 Flash-Lite 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 Flash-Lite
- $0.025
- 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 Flash-LiteGLM-5.1
Context window
Maximum documented context; output-token limits may be lower.
Gemini 3.1 Flash-Lite
GLM-5.1
203K
API model ID
Gemini 3.1 Flash-Lite
gemini-3.1-flash-lite
Google Gemini API pricingGLM-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 Flash-Lite
$0.025 per 1M cached input tokens
Google Gemini API pricingGLM-5.1
Not published
Documented inputs
Gemini 3.1 Flash-Lite
Not sourced
GLM-5.1
Not sourced
Documented outputs
Gemini 3.1 Flash-Lite
Not sourced
GLM-5.1
Not sourced
Provider availability
Gemini 3.1 Flash-Lite
Not sourced
GLM-5.1
Not sourced
Reasoning profile
Gemini 3.1 Flash-Lite
Non-Reasoning
GLM-5.1
Reasoning
Weight access
Gemini 3.1 Flash-Lite
Proprietary
GLM-5.1
Open Weight
License
Gemini 3.1 Flash-Lite
Proprietary
GLM-5.1
Open Weight
Release date
Gemini 3.1 Flash-Lite
2026-03-03
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
- GLM-5.1 has the higher public score estimate, 57.71 versus 47.46, but the 90% score intervals overlap.
- Workload cost
- Repository review: $0.017 vs $0.0832. Cache-heavy agent loop: $0.025 vs $0.352.
- Context tradeoff
- Gemini 3.1 Flash-Lite 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 Flash-Lite or GLM-5.1?
GLM-5.1 has the higher public score estimate, 57.71 versus 47.46, 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 Flash-Lite or GLM-5.1?
GLM-5.1 scores higher for coding on the public lane, 51.5 to 28.4. Gemini 3.1 Flash-Lite is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which is better for agentic tasks, Gemini 3.1 Flash-Lite or GLM-5.1?
GLM-5.1 scores higher for agentic tasks on the public lane, 42.1 to 27.5. Gemini 3.1 Flash-Lite and GLM-5.1 are 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 Flash-Lite or GLM-5.1?
For the stated presets, chat costs $0.001 on Gemini 3.1 Flash-Lite and $0.0036 on GLM-5.1; repository review costs $0.017 and $0.0832; the cache-heavy agent loop costs $0.025 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 Flash-Lite or GLM-5.1?
Gemini 3.1 Flash-Lite 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 Flash-Lite
API / mo$1,313
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 evidence27 rows
Agentic
Gert Labs
Shared sourceGemini 3.1 Flash-Lite38.46%GLM-5.160.11%GLM-5.1 leads this result
Terminal-Bench 2.1 (Vals)
Gemini 3.1 Flash-Lite34.1%SourceGLM-5.156.9%SourceGLM-5.1 leads this result
Terminal-Bench 2.0
Gemini 3.1 Flash-Lite—GLM-5.163.5%SourceNot directly comparable
BrowseComp
Gemini 3.1 Flash-Lite—GLM-5.168%SourceNot directly comparable
τ³-bench results
Gemini 3.1 Flash-Lite—GLM-5.170.6%SourceNot directly comparable
MCP Atlas
Gemini 3.1 Flash-Lite—GLM-5.171.8%SourceNot directly comparable
CyberGym
Gemini 3.1 Flash-Lite—GLM-5.168.7%SourceNot directly comparable
Claw-Eval
Gemini 3.1 Flash-Lite—GLM-5.162.3%SourceNot directly comparable
ResearchClawBench
Gemini 3.1 Flash-Lite—GLM-5.118.2%SourceNot directly comparable
Coding
Vibe Code Bench
Shared sourceGemini 3.1 Flash-Lite0.00%GLM-5.131.46%GLM-5.1 leads this result
LiveCodeBench (Vals)
Gemini 3.1 Flash-Lite80.1%SourceGLM-5.181.4%SourceGLM-5.1 leads this result
SWE-bench (Vals)
Gemini 3.1 Flash-Lite62.8%SourceGLM-5.176.4%SourceGLM-5.1 leads this result
SWE-bench Pro
Gemini 3.1 Flash-Lite—GLM-5.158.4%SourceNot directly comparable
NL2Repo
Gemini 3.1 Flash-Lite—GLM-5.142.7%SourceNot directly comparable
SWE-Rebench
Gemini 3.1 Flash-Lite—GLM-5.162.7%SourceNot directly comparable
OpenHarmony Bench
Gemini 3.1 Flash-Lite—GLM-5.152.3%SourceNot directly comparable
Multimodal
CharXiv
Gemini 3.1 Flash-Lite73.2%SourceGLM-5.1—Not directly comparable
Knowledge
GPQA Diamond (Vals)
Gemini 3.1 Flash-Lite81.1%SourceGLM-5.184.5%SourceGLM-5.1 leads this result
MMLU-Pro (Vals)
Gemini 3.1 Flash-Lite86.2%SourceGLM-5.186.9%SourceGLM-5.1 leads this result
GPQA-D
Gemini 3.1 Flash-Lite—GLM-5.186.2%SourceNot directly comparable
HLE
Gemini 3.1 Flash-Lite—GLM-5.152.3%SourceNot directly comparable
Math
AIME26
Gemini 3.1 Flash-Lite—GLM-5.195.3%SourceNot directly comparable
HMMT Nov 2025
Gemini 3.1 Flash-Lite—GLM-5.194.0%SourceNot directly comparable
HMMT Feb 2026
Gemini 3.1 Flash-Lite—GLM-5.182.6%SourceNot directly comparable
MMAnswerBench
Gemini 3.1 Flash-Lite—GLM-5.183.8%SourceNot directly comparable
FrontierMath v2 (Tiers 1-3)
Gemini 3.1 Flash-Lite—GLM-5.133.448%SourceNot directly comparable
FrontierMath v2 (Tier 4)
Gemini 3.1 Flash-Lite—GLM-5.112.500%SourceNot directly comparable
27 public results · 7 shared
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Last updated September 23, 2026