Long documents
Prompts that approach the documented context limit
GPT-5.2
GPT-5.2 has the larger documented context window.
Confidence: documented
GPT-5.2 vs Kimi K2.5 (Reasoning)
Updated October 17, 2026. Rank says GPT-5.2 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
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Decision reading
GPT-5.2 has the higher public point estimate, 59.86 versus 56.09. Their conditional score ranges overlap. These ranges do not establish rank confidence. 9 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Model B
Moonshot AI
56.09/100
Estimated · Public rank #63
Conditional range 41.7–70.4
- Shared results
- 9
- GPT-5.2 only
- 22
- Kimi K2.5 (Reasoning) only
- 6
- Like-for-like categories
- 1 / 8
Supported: GPT-5.2 · Estimated: Kimi K2.5 (Reasoning). 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
Kimi K2.5 (Reasoning)
Kimi K2.5 (Reasoning) 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
Kimi K2.5 (Reasoning)
Kimi K2.5 (Reasoning) has the lower estimated token cost for this stated workload. GPT-5.2 has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2.5 (Reasoning) has no published cached-input rate, so cached tokens use its listed input rate.
Confidence: rate-fallback
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
Kimi K2.5 (Reasoning)
Kimi K2.5 (Reasoning) 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 K2.5 (Reasoning) 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
Kimi K2.5 (Reasoning) is scored on Estimated evidence for agentic, so the reading is directional rather than like-for-like.
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.
36.8GPT-5.2—Kimi K2.5 (Reasoning)
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
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
22 GPT-5.2 only
9 Shared
6 Kimi K2.5 (Reasoning) 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.
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.
OSWorld-VerifiedAgentic
Normalized gap 16.0GPT-5.2:47.3%Kimi K2.5 (Reasoning):63.3%BrowseCompAgentic
Normalized gap 5.2GPT-5.2:65.8%Kimi K2.5 (Reasoning):60.6%GPQAKnowledge
Normalized gap 4.8GPT-5.2:92.4%Kimi K2.5 (Reasoning):87.6%CharXivMultimodal
Normalized gap 4.6GPT-5.2:82.1%Kimi K2.5 (Reasoning):77.5%SWE-bench VerifiedCoding
Normalized gap 3.2GPT-5.2:80%Kimi K2.5 (Reasoning):76.8%
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 v5.8 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.
Multimodal
Like-for-like- GPT-5.2
- 75.9
- #22/54
- Kimi K2.5 (Reasoning)
- 69.0
- #33/54
- Basis
- Provisional lane · 2 vs 2 weighted rows
- Reading
- GPT-5.2 leads
Agentic
Directional only- GPT-5.2
- 44.4
- Supported · #58/128
- Kimi K2.5 (Reasoning)
- 38.3
- Estimated · #71/128
- Basis
- BenchAlign v5.8 lane · 4 vs 4 public rows
- Reading
- Directional only
Knowledge
Directional only- GPT-5.2
- 59.7
- Supported · #50/184
- Kimi K2.5 (Reasoning)
- 48.8
- Estimated · #85/184
- Basis
- BenchAlign v5.8 lane · 1 vs 2 public rows
- Reading
- Directional only
Coding
Not comparable- GPT-5.2
- 36.8
- Supported · #73/150
- Kimi K2.5 (Reasoning)
- Not ranked
- Basis
- BenchAlign v5.8 lane · 3 vs 4 public rows
- Reading
- Not comparable
Reasoning
Not comparable- GPT-5.2
- 64.3
- Unranked · 4 rankable rows
- Kimi K2.5 (Reasoning)
- 67.1
- Unranked · 1 rankable row
- Basis
- Provisional lane · 1 vs 1 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- GPT-5.2
- Not ranked
- Kimi K2.5 (Reasoning)
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- GPT-5.2
- 92.6
- #19/148
- Kimi K2.5 (Reasoning)
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- GPT-5.2
- 71.1
- Unranked · 3 rankable rows
- Kimi K2.5 (Reasoning)
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
| Category | GPT-5.2 | Kimi K2.5 (Reasoning) | Basis | Reading |
|---|---|---|---|---|
| Multimodal | 75.9#22/54 | 69.0#33/54 | Like-for-likeProvisional lane · 2 vs 2 weighted rows | GPT-5.2 leads |
| Agentic | 44.4Supported · #58/128 | 38.3Estimated · #71/128 | Directional onlyBenchAlign v5.8 lane · 4 vs 4 public rows | Directional only |
| Knowledge | 59.7Supported · #50/184 | 48.8Estimated · #85/184 | Directional onlyBenchAlign v5.8 lane · 1 vs 2 public rows | Directional only |
| Coding | 36.8Supported · #73/150 | Not ranked | Not comparableBenchAlign v5.8 lane · 3 vs 4 public rows | Not comparable |
| Reasoning | 64.3Unranked · 4 rankable rows | 67.1Unranked · 1 rankable row | Not comparableProvisional lane · 1 vs 1 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | 92.6#19/148 | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | 71.1Unranked · 3 rankable rows | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, 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
- GPT-5.2
- $0.00875
- Fits in one request
- Kimi K2.5 (Reasoning)
- $0.0021
- Fits in one request
Kimi K2.5 (Reasoning) has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- GPT-5.2
- $0.1295
- Fits in one request
- Kimi K2.5 (Reasoning)
- $0.039
- Fits in one request
Kimi K2.5 (Reasoning) 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-5.2
- $0.525
- Fits in one request
- Cached input priced at the published list-input rate
- Kimi K2.5 (Reasoning)
- $0.162
- Fits in one request
- Cached input priced at the published list-input rate
Kimi K2.5 (Reasoning) has the lower modeled cost
GPT-5.2 has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2.5 (Reasoning) 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-5.2Kimi K2.5 (Reasoning)
Context window
Maximum documented context; output-token limits may be lower.
GPT-5.2
400K
Kimi K2.5 (Reasoning)
256K
API model ID
GPT-5.2
Not sourced
Kimi K2.5 (Reasoning)
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
GPT-5.2
Not published
Kimi K2.5 (Reasoning)
Not published
Documented inputs
GPT-5.2
Not sourced
Kimi K2.5 (Reasoning)
Not sourced
Documented outputs
GPT-5.2
Not sourced
Kimi K2.5 (Reasoning)
Not sourced
Provider availability
GPT-5.2
Not sourced
Kimi K2.5 (Reasoning)
Not sourced
Reasoning profile
GPT-5.2
Reasoning
Kimi K2.5 (Reasoning)
Reasoning
Weight access
GPT-5.2
Proprietary
Kimi K2.5 (Reasoning)
Proprietary
License
GPT-5.2
Proprietary
Kimi K2.5 (Reasoning)
Proprietary
Release date
GPT-5.2
2025-12-11
Kimi K2.5 (Reasoning)
2026-01-27
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
- GPT-5.2 has the higher public point estimate, 59.86 versus 56.09. Their conditional score ranges overlap. These ranges do not establish rank confidence.
- Workload cost
- Repository review: $0.1295 vs $0.039. Cache-heavy agent loop: $0.525 vs $0.162.
- Context tradeoff
- GPT-5.2 has the larger documented window (400K).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, GPT-5.2 or Kimi K2.5 (Reasoning)?
GPT-5.2 has the higher public point estimate, 59.86 versus 56.09. Their conditional score ranges overlap. These ranges do not establish rank confidence. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, GPT-5.2 or Kimi K2.5 (Reasoning)?
Kimi K2.5 (Reasoning) is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, GPT-5.2 or Kimi K2.5 (Reasoning)?
GPT-5.2 scores higher for agentic tasks on the public lane, 44.4 to 38.3. Kimi K2.5 (Reasoning) 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, GPT-5.2 or Kimi K2.5 (Reasoning)?
For the stated presets, chat costs $0.00875 on GPT-5.2 and $0.0021 on Kimi K2.5 (Reasoning); repository review costs $0.1295 and $0.039; the cache-heavy agent loop costs $0.525 and $0.162. GPT-5.2 has no published cached-input rate, so cached tokens use its listed input rate. Kimi K2.5 (Reasoning) has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, GPT-5.2 or Kimi K2.5 (Reasoning)?
GPT-5.2 has the larger documented context window: 400K, compared with 256K.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence37 rows
Agentic
BrowseComp
GPT-5.265.8%SourceKimi K2.5 (Reasoning)60.6%SourceGPT-5.2 leads this result
OSWorld-Verified
GPT-5.247.3%SourceKimi K2.5 (Reasoning)63.3%SourceKimi K2.5 (Reasoning) leads this result
Gert Labs
Shared sourceGPT-5.246.54%Kimi K2.5 (Reasoning)32.58%GPT-5.2 leads this result
JobBench
GPT-5.234.3%SourceKimi K2.5 (Reasoning)—Not directly comparable
Terminal-Bench 2.0
GPT-5.2—Kimi K2.5 (Reasoning)50.8%SourceNot directly comparable
Coding
SWE-bench Verified
GPT-5.280%SourceKimi K2.5 (Reasoning)76.8%SourceGPT-5.2 leads this result
SWE-bench Pro
GPT-5.255.6%SourceKimi K2.5 (Reasoning)—Not directly comparable
Vibe Code Bench
Shared sourceGPT-5.253.50%Kimi K2.5 (Reasoning)17.54%GPT-5.2 leads this result
LiveCodeBench v6
GPT-5.2—Kimi K2.5 (Reasoning)85.0%SourceNot directly comparable
Terminal-Bench 2.0
GPT-5.2—Kimi K2.5 (Reasoning)50.8%SourceNot directly comparable
Reasoning
Multimodal
MMMU
GPT-5.286.7%SourceKimi K2.5 (Reasoning)—Not directly comparable
MMMU-Pro
GPT-5.279.5%SourceKimi K2.5 (Reasoning)78.5%SourceGPT-5.2 leads this result
RealWorldQA
GPT-5.283.3%SourceKimi K2.5 (Reasoning)—Not directly comparable
OmniDocBench 1.5
GPT-5.285.7%SourceKimi K2.5 (Reasoning)—Not directly comparable
Video-MME (with subtitle)
GPT-5.286.0%SourceKimi K2.5 (Reasoning)—Not directly comparable
Video-MME (w/o subtitle)
GPT-5.285.8%SourceKimi K2.5 (Reasoning)—Not directly comparable
MathVision
GPT-5.283.0%SourceKimi K2.5 (Reasoning)—Not directly comparable
We-Math
GPT-5.279.0%SourceKimi K2.5 (Reasoning)—Not directly comparable
DynaMath
GPT-5.286.8%SourceKimi K2.5 (Reasoning)—Not directly comparable
SimpleVQA
GPT-5.255.8%SourceKimi K2.5 (Reasoning)—Not directly comparable
CC-OCR
GPT-5.270.3%SourceKimi K2.5 (Reasoning)—Not directly comparable
AI2D_TEST
GPT-5.292.2%SourceKimi K2.5 (Reasoning)—Not directly comparable
CountBench
GPT-5.291.9%SourceKimi K2.5 (Reasoning)—Not directly comparable
ERQA
GPT-5.259.8%SourceKimi K2.5 (Reasoning)—Not directly comparable
VideoMMMU
GPT-5.285.9%SourceKimi K2.5 (Reasoning)—Not directly comparable
MLVU (M-Avg)
GPT-5.285.6%SourceKimi K2.5 (Reasoning)—Not directly comparable
CharXiv
GPT-5.282.1%SourceKimi K2.5 (Reasoning)77.5%SourceGPT-5.2 leads this result
V*
GPT-5.275.9%SourceKimi K2.5 (Reasoning)—Not directly comparable
Knowledge
Math
AIME 2025
GPT-5.2100%SourceKimi K2.5 (Reasoning)96.1%SourceGPT-5.2 leads this result
FrontierMath v2 (Tiers 1-3)
GPT-5.267.400%SourceKimi K2.5 (Reasoning)—Not directly comparable
FrontierMath v2 (Tier 4)
GPT-5.231.700%SourceKimi K2.5 (Reasoning)—Not directly comparable
HMMT Feb 2025
GPT-5.2—Kimi K2.5 (Reasoning)95.4%SourceNot directly comparable
37 public results · 9 shared
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Last updated October 17, 2026