Long documents
Prompts that approach the documented context limit
Kimi K3.1 Pro
Kimi K3.1 Pro has the larger documented context window.
Confidence: documented
Gemini 4 Hydrogen vs Kimi K3.1 Pro
Updated November 12, 2026. We do not rank this pair: at least one has no public score. Public scores include evidence status and uncertainty.
Share or export
Decision reading
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. 2 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- API price per 1M tokens
Gemini 4 Hydrogen: $1.50 input / $7.50 output
Kimi K3.1 Pro: $2 input / $10 output
- Context window
Gemini 4 Hydrogen: 1M
Kimi K3.1 Pro: 1.05M
- Released
Gemini 4 Hydrogen: November 12, 2026
Kimi K3.1 Pro: October 23, 2026
- Shared results
- 2
- Gemini 4 Hydrogen only
- 3
- Kimi K3.1 Pro only
- 45
- Like-for-like categories
- 0 / 8
Estimated: Kimi K3.1 Pro. Conditional ranges do not establish rank confidence.How 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 4 Hydrogen
Gemini 4 Hydrogen has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Gemini 4 Hydrogen
Gemini 4 Hydrogen 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 4 Hydrogen
Gemini 4 Hydrogen 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 4 Hydrogen is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Gemini 4 Hydrogen is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
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.
—Gemini 4 Hydrogen60.9Kimi K3.1 Pro
Not comparable · BenchAlign v5.8
The coding row is not comparable on the public lane: at least one model is not measured or not ranked there.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Same basis rules as the category table below
Or describe your own job
The LLM Selector reads what you need a model for and returns a shortlist, ranked in the same order the job pages publish.
Describe the task and constraints. This selector recommends models; it cannot carry out the task or access your files and accounts.
We keep what you type here, drafts included, for 180 days, and after that only the job and requirements read from it. Nothing is tied to your IP address or account. Leave out names and other personal details. Privacy
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
3 Gemini 4 Hydrogen only
2 Shared
45 Kimi K3.1 Pro only
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.
A shared-evidence shape is not available.
BenchLM does not draw a radar or infer missing axes when the matched evidence is too sparse.
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign v5.8 lane for agentic, coding, reasoning, multimodal, 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
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- 69.3
- Supported · #12/135
- Basis
- BenchAlign v5.8 lane · 3 vs 19 public rows
- Reading
- Not comparable
Coding
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- 60.9
- Supported · #16/161
- Basis
- BenchAlign v5.8 lane · 1 vs 8 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- 68.9
- Supported · #18/160
- Basis
- BenchAlign v5.8 lane · 0 vs 0 public rows
- Reading
- Not comparable
Multimodal
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- 72.4
- Estimated · #12/67
- Basis
- BenchAlign v5.8 lane · 1 vs 15 public rows
- Reading
- Not comparable
Knowledge
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- 73.6
- Supported · #14/180
- Basis
- BenchAlign v5.8 lane · 0 vs 5 public rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Gemini 4 Hydrogen
- Not ranked
- Kimi K3.1 Pro
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Gemini 4 Hydrogen | Kimi K3.1 Pro | Basis | Reading |
|---|---|---|---|---|
| Agentic | Not ranked | 69.3Supported · #12/135 | Not comparableBenchAlign v5.8 lane · 3 vs 19 public rows | Not comparable |
| Coding | Not ranked | 60.9Supported · #16/161 | Not comparableBenchAlign v5.8 lane · 1 vs 8 public rows | Not comparable |
| Reasoning | Not ranked | 68.9Supported · #18/160 | Not comparableBenchAlign v5.8 lane · 0 vs 0 public rows | Not comparable |
| Multimodal | Not ranked | 72.4Estimated · #12/67 | Not comparableBenchAlign v5.8 lane · 1 vs 15 public rows | Not comparable |
| Knowledge | Not ranked | 73.6Supported · #14/180 | Not comparableBenchAlign v5.8 lane · 0 vs 5 public rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, reasoning, multimodal, and knowledge denominators (BenchAlign v5.8) 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 4 Hydrogen
- $0.00525
- Fits in one request
- Kimi K3.1 Pro
- $0.007
- Fits in one request
Gemini 4 Hydrogen has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 4 Hydrogen
- $0.0975
- Fits in one request
- Kimi K3.1 Pro
- $0.13
- Fits in one request
Gemini 4 Hydrogen 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 4 Hydrogen
- $0.12
- Fits in one request
- Kimi K3.1 Pro
- $0.18
- Fits in one request
Gemini 4 Hydrogen has the lower modeled cost
Costs use the listed standard API rates.
Your workload
Enter a month of tokens to price it at both models’ listed API rates.
- Gemini 4 Hydrogen
- $30.00
- per month
- Kimi K3.1 Pro
- $40.00
- per month
Standard listed rates, no batch or volume discounts.
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 4 HydrogenKimi K3.1 Pro
Context window
Maximum documented context; output-token limits may be lower.
Gemini 4 Hydrogen
Kimi K3.1 Pro
1.05M
API model ID
Gemini 4 Hydrogen
gemini-4-hydrogen
Google Gemini 4 Hydrogen model documentationKimi K3.1 Pro
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Gemini 4 Hydrogen
$0.075 per 1M cached input tokens
Google Gemini API pricingKimi K3.1 Pro
$0.2 per 1M cached input tokens
Documented inputs
Gemini 4 Hydrogen
text, image, video, audio, pdf
Google Gemini 4 Hydrogen model documentationKimi K3.1 Pro
text, image
Kimi-K3.1-Pro model cardDocumented outputs
Gemini 4 Hydrogen
Kimi K3.1 Pro
Provider availability
Gemini 4 Hydrogen
Generally Available · Gemini API, Google AI Studio
Google Gemini 4 Hydrogen model documentationKimi K3.1 Pro
Not sourced
Reasoning profile
Gemini 4 Hydrogen
Reasoning
Kimi K3.1 Pro
Reasoning
Weight access
Gemini 4 Hydrogen
Proprietary
Kimi K3.1 Pro
Open Weight
License
Gemini 4 Hydrogen
Proprietary
Kimi K3.1 Pro
Open Weight
Release date
Gemini 4 Hydrogen
2026-11-12
Kimi K3.1 Pro
2026-10-23
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
- At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
- Workload cost
- Repository review: $0.0975 vs $0.13. Cache-heavy agent loop: $0.12 vs $0.18.
- Context tradeoff
- Kimi K3.1 Pro has the larger documented window (1.05M).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Gemini 4 Hydrogen or Kimi K3.1 Pro?
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Gemini 4 Hydrogen or Kimi K3.1 Pro?
Gemini 4 Hydrogen is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Gemini 4 Hydrogen or Kimi K3.1 Pro?
Gemini 4 Hydrogen is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Gemini 4 Hydrogen or Kimi K3.1 Pro?
For the stated presets, chat costs $0.00525 on Gemini 4 Hydrogen and $0.007 on Kimi K3.1 Pro; repository review costs $0.0975 and $0.13; the cache-heavy agent loop costs $0.12 and $0.18. Costs use the listed standard API rates.
Which has the larger context window, Gemini 4 Hydrogen or Kimi K3.1 Pro?
Kimi K3.1 Pro has the larger documented context window: 1.05M, compared with 1M.
Self-host vs API cost
Estimates at 50,000 req/day · 1000 tokens/req average.
Gemini 4 Hydrogen
API / mo$6,750
Self-host / moNot listed
Break-even—
Proprietary model — self-hosting not applicable.
Kimi K3.1 Pro
API / mo$9,000
Self-host / mo$57,606
Break-evenNot reached at 70% load
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence50 rows
Agentic
OSWorld 2.1 Offline
Gemini 4 Hydrogen77.6%SourceKimi K3.1 Pro—Not directly comparable
MKA
Gemini 4 Hydrogen53.4%SourceKimi K3.1 Pro—Not directly comparable
Terminal-Bench-Science 0.1
Gemini 4 Hydrogen51.4%SourceKimi K3.1 Pro38.1%SourceGemini 4 Hydrogen leads this result
Terminal-Bench 4.0
Gemini 4 Hydrogen—Kimi K3.1 Pro65.70%SourceNot directly comparable
HLE w/ tools
Gemini 4 Hydrogen—Kimi K3.1 Pro70.0%SourceNot directly comparable
BrowseComp
Gemini 4 Hydrogen—Kimi K3.1 Pro92.1%SourceNot directly comparable
BioMysteryBench
Gemini 4 Hydrogen—Kimi K3.1 Pro80.6%SourceNot directly comparable
Agents' Last Exam
Gemini 4 Hydrogen—Kimi K3.1 Pro43.2%SourceNot directly comparable
Agents' Last Exam (CLI)
Gemini 4 Hydrogen—Kimi K3.1 Pro44.2%SourceNot directly comparable
APEX-Agents
Gemini 4 Hydrogen—Kimi K3.1 Pro69.4%SourceNot directly comparable
Frontier Finance
Gemini 4 Hydrogen—Kimi K3.1 Pro58.6%SourceNot directly comparable
HANDBOOK.md
Gemini 4 Hydrogen—Kimi K3.1 Pro44.6%SourceNot directly comparable
OSWorld 2.0
Gemini 4 Hydrogen—Kimi K3.1 Pro79.6%SourceNot directly comparable
Business Operation
Gemini 4 Hydrogen—Kimi K3.1 Pro37.8%SourceNot directly comparable
Financial Modeling
Gemini 4 Hydrogen—Kimi K3.1 Pro57.6%SourceNot directly comparable
Financial Research
Gemini 4 Hydrogen—Kimi K3.1 Pro70.4%SourceNot directly comparable
Kimi Hallu Bench Hard (tools)
Gemini 4 Hydrogen—Kimi K3.1 Pro8.3%SourceNot directly comparable
ExploitGym
Gemini 4 Hydrogen—Kimi K3.1 Pro20.7%SourceNot directly comparable
MazeBench
Gemini 4 Hydrogen—Kimi K3.1 Pro2%SourceNot directly comparable
OSWorld 2.1
Gemini 4 Hydrogen—Kimi K3.1 Pro79.6%SourceNot directly comparable
CWE-bench
Gemini 4 Hydrogen—Kimi K3.1 Pro45.3%SourceNot directly comparable
Coding
FrontierCode 2.0
Shared sourceGemini 4 Hydrogen38.2%Kimi K3.1 Pro19.6%Gemini 4 Hydrogen leads this result
DeepSWE
Gemini 4 Hydrogen—Kimi K3.1 Pro75.5%SourceNot directly comparable
ProgramBench (binary)
Gemini 4 Hydrogen—Kimi K3.1 Pro31.5%SourceNot directly comparable
Kimi Code Bench v2
Gemini 4 Hydrogen—Kimi K3.1 Pro77.1%SourceNot directly comparable
Kimi Code Bench 3.0 Long-horizon
Gemini 4 Hydrogen—Kimi K3.1 Pro61.2%SourceNot directly comparable
sweMarathon
Gemini 4 Hydrogen—Kimi K3.1 Pro51.7%SourceNot directly comparable
PostTrainBench
Gemini 4 Hydrogen—Kimi K3.1 Pro36.5%SourceNot directly comparable
Bug Hunt Bench
Gemini 4 Hydrogen—Kimi K3.1 Pro36.0 fixesSourceNot directly comparable
Multimodal
Chartography (no tools)
Gemini 4 Hydrogen66.6%SourceKimi K3.1 Pro—Not directly comparable
OfficeQA Pro
Gemini 4 Hydrogen—Kimi K3.1 Pro67.4%SourceNot directly comparable
OfficeQA Pro v2
Gemini 4 Hydrogen—Kimi K3.1 Pro64.4%SourceNot directly comparable
BenchCAD Vision2Code (no tools)
Gemini 4 Hydrogen—Kimi K3.1 Pro0.728SourceNot directly comparable
BenchCAD Vision2Code (tools)
Gemini 4 Hydrogen—Kimi K3.1 Pro0.927SourceNot directly comparable
MMMU-Pro
Gemini 4 Hydrogen—Kimi K3.1 Pro84.1%SourceNot directly comparable
MMMU-Pro w/ Python
Gemini 4 Hydrogen—Kimi K3.1 Pro90%SourceNot directly comparable
CharXiv
Gemini 4 Hydrogen—Kimi K3.1 Pro93.4%SourceNot directly comparable
CharXiv w/o tools
Gemini 4 Hydrogen—Kimi K3.1 Pro89%SourceNot directly comparable
Chartography (tools)
Gemini 4 Hydrogen—Kimi K3.1 Pro90.2%SourceNot directly comparable
BabyVision w/ Python
Gemini 4 Hydrogen—Kimi K3.1 Pro95.4%SourceNot directly comparable
ZeroBench
Gemini 4 Hydrogen—Kimi K3.1 Pro39.0%SourceNot directly comparable
ZeroBench w/ Python
Gemini 4 Hydrogen—Kimi K3.1 Pro63.0%SourceNot directly comparable
GDP.pdf (Gemini judge)
Gemini 4 Hydrogen—Kimi K3.1 Pro34.6%SourceNot directly comparable
GDP.pdf w/ Python (Gemini judge)
Gemini 4 Hydrogen—Kimi K3.1 Pro85.7%SourceNot directly comparable
PerceptionBench
Gemini 4 Hydrogen—Kimi K3.1 Pro68.3%SourceNot directly comparable
Knowledge
GPQA
Gemini 4 Hydrogen—Kimi K3.1 Pro94.2%SourceNot directly comparable
GPQA-D
Gemini 4 Hydrogen—Kimi K3.1 Pro94.2%SourceNot directly comparable
HLE
Gemini 4 Hydrogen—Kimi K3.1 Pro70%SourceNot directly comparable
HLE w/o tools
Gemini 4 Hydrogen—Kimi K3.1 Pro51.1%SourceNot directly comparable
Kimi Hallu Bench
Gemini 4 Hydrogen—Kimi K3.1 Pro5.4%SourceNot directly comparable
50 public results · 2 shared
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Last updated November 12, 2026