Chat turn cost
1K fresh input + 500 output tokens
GPT-4o mini
GPT-4o mini has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
GPT-4o mini vs Kimi K2
Updated September 22, 2026. Rank cannot separate these two. Price, access, and your workload decide. 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
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Decision reading
The public evidence has no benchmark result shared by both models, so it does not support a quality verdict. Use the documented cost, context, and runtime rows instead. 0 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 0
- GPT-4o mini only
- 0
- Kimi K2 only
- 2
- Like-for-like categories
- 0 / 8
Supported: GPT-4o mini · Estimated: Kimi K2How 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.
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
GPT-4o mini
GPT-4o mini 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
Kimi K2 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
GPT-4o mini and Kimi K2 are not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limitedLong documents
Prompts that approach the documented context limit
No clear pick
The documented context windows are equal.
Confidence: documentedCache-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. GPT-4o mini does not fit this workload in one request. Kimi K2 does not fit this workload in one request. GPT-4o mini has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2 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.
18.4GPT-4o mini—Kimi K2
Not comparable · BenchAlign v5.6
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
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
2 Kimi K2 only
2 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.
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 v5.6 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.
Knowledge
Directional only- GPT-4o mini
- 19.5
- Estimated · #156/160
- Kimi K2
- 35.9
- Estimated · #102/160
- Basis
- BenchAlign v5.6 lane · 0 vs 0 public rows
- Reading
- Directional only
Instruction following
Directional only- GPT-4o mini
- 33.2
- #113/124
- Kimi K2
- 47.0
- #85/124
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Directional only
Agentic
Not comparable- GPT-4o mini
- Not ranked
- Kimi K2
- Not ranked
- Basis
- BenchAlign v5.6 lane · 0 vs 0 public rows
- Reading
- Not comparable
Coding
Not comparable- GPT-4o mini
- 18.4
- Estimated · #134/135
- Kimi K2
- Not ranked
- Basis
- BenchAlign v5.6 lane · 0 vs 0 public rows
- Reading
- Not comparable
Reasoning
Not comparable- GPT-4o mini
- Not ranked
- Kimi K2
- 57.4
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- GPT-4o mini
- 25.4
- Unranked · 1 rankable row
- Kimi K2
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- GPT-4o mini
- Not ranked
- Kimi K2
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- GPT-4o mini
- Not ranked
- Kimi K2
- 39.0
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 0 vs 2 weighted rows
- Reading
- Not comparable
| Category | GPT-4o mini | Kimi K2 | Basis | Reading |
|---|---|---|---|---|
| Knowledge | 19.5Estimated · #156/160 | 35.9Estimated · #102/160 | Directional onlyBenchAlign v5.6 lane · 0 vs 0 public rows | Directional only |
| Instruction following | 33.2#113/124 | 47.0#85/124 | Directional onlyProvisional lane · 0 vs 0 weighted rows | Directional only |
| Agentic | Not ranked | Not ranked | Not comparableBenchAlign v5.6 lane · 0 vs 0 public rows | Not comparable |
| Coding | 18.4Estimated · #134/135 | Not ranked | Not comparableBenchAlign v5.6 lane · 0 vs 0 public rows | Not comparable |
| Reasoning | Not ranked | 57.4Unranked · 2 rankable rows | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 25.4Unranked · 1 rankable row | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | Not ranked | 39.0Unranked · 2 rankable rows | Not comparableProvisional lane · 0 vs 2 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.
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
- GPT-4o mini
- $0.00045
- Fits in one request
- Kimi K2
- $0.00185
- Fits in one request
GPT-4o mini has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- GPT-4o mini
- $0.0093
- Fits in one request
- Kimi K2
- $0.0375
- Fits in one request
GPT-4o mini has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- GPT-4o mini
- $0.039
- Does not fit in one request
- Cached input priced at the published list-input rate
- Kimi K2
- $0.157
- Does not fit in one request
- Cached input priced at the published list-input rate
GPT-4o mini does not fit this workload in one request. Kimi K2 does not fit this workload in one request. GPT-4o mini has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2 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.
SpecificationGPT-4o miniKimi K2
Context window
Maximum documented context; output-token limits may be lower.
GPT-4o mini
128K
Kimi K2
128K
API model ID
GPT-4o mini
Not sourced
Kimi K2
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
GPT-4o mini
Not published
Kimi K2
Not published
Documented inputs
GPT-4o mini
Not sourced
Kimi K2
Not sourced
Documented outputs
GPT-4o mini
Not sourced
Kimi K2
Not sourced
Provider availability
GPT-4o mini
Not sourced
Kimi K2
Not sourced
Reasoning profile
GPT-4o mini
Non-Reasoning
Kimi K2
Non-Reasoning
Weight access
GPT-4o mini
Proprietary
Kimi K2
Proprietary
License
GPT-4o mini
Proprietary
Kimi K2
Proprietary
Release date
GPT-4o mini
2024-07-18
Kimi K2
2025-07-01
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
- The public evidence has no benchmark result shared by both models, so it does not support a quality verdict.
- Workload cost
- Repository review: $0.0093 vs $0.0375. Cache-heavy agent loop: $0.039 vs $0.157.
- Context tradeoff
- Both models list 128K.
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, GPT-4o mini or Kimi K2?
The public evidence has no benchmark result shared by both models, so it does not support a quality verdict. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, GPT-4o mini or Kimi K2?
Kimi K2 is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, GPT-4o mini or Kimi K2?
GPT-4o mini and Kimi K2 are not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, GPT-4o mini or Kimi K2?
For the stated presets, chat costs $0.00045 on GPT-4o mini and $0.00185 on Kimi K2; repository review costs $0.0093 and $0.0375; the cache-heavy agent loop costs $0.039 and $0.157. GPT-4o mini does not fit this workload in one request. Kimi K2 does not fit this workload in one request. GPT-4o mini has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2 has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, GPT-4o mini or Kimi K2?
Both models list the same context window, 128K.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence2 rows
2 public results · 0 shared
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Last updated September 22, 2026