Agentic
Not comparable- Gemini 3.6 Flash
- 50.7
- Supported · #60/151
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- BenchAlign lane · 2 vs 0 public rows
- Reading
- Not comparable
Gemini 3.6 Flash vs GPT-5.1-Codex-Max
Updated September 4, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
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.
Share or export
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 3.6 Flash
Gemini 3.6 Flash has the larger documented context window.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
Gemini 3.6 Flash
Gemini 3.6 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Gemini 3.6 Flash
Gemini 3.6 Flash 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
GPT-5.1-Codex-Max
GPT-5.1-Codex-Max has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
GPT-5.1-Codex-Max is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
GPT-5.1-Codex-Max is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
8 Gemini 3.6 Flash only
1 GPT-5.1-Codex-Max only
- Shared results
- 0
- Gemini 3.6 Flash only
- 8
- GPT-5.1-Codex-Max only
- 1
- Like-for-like categories
- 0 / 8
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign 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
Not comparable- Gemini 3.6 Flash
- 58.9
- Supported · #30/183
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- BenchAlign lane · 4 vs 1 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Gemini 3.6 Flash
- 77.8
- Unranked · 2 rankable rows
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Knowledge
Not comparable- Gemini 3.6 Flash
- 68.6
- Supported · #18/181
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- BenchAlign lane · 2 vs 0 public rows
- Reading
- Not comparable
Math
Not comparable- Gemini 3.6 Flash
- Not ranked
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Gemini 3.6 Flash
- Not ranked
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Gemini 3.6 Flash
- 82.3
- Unranked · 1 rankable row
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Gemini 3.6 Flash
- Not ranked
- GPT-5.1-Codex-Max
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Gemini 3.6 Flash | GPT-5.1-Codex-Max | Basis | Reading |
|---|---|---|---|---|
| Agentic | 50.7Supported · #60/151 | Not ranked | Not comparableBenchAlign lane · 2 vs 0 public rows | Not comparable |
| Coding | 58.9Supported · #30/183 | Not ranked | Not comparableBenchAlign lane · 4 vs 1 public rows | Not comparable |
| Reasoning | 77.8Unranked · 2 rankable rows | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Knowledge | 68.6Supported · #18/181 | Not ranked | Not comparableBenchAlign lane · 2 vs 0 public rows | Not comparable |
| Math | Not ranked | 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 |
| Multimodal | 82.3Unranked · 1 rankable row | 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 |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
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.
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 3.6 Flash
- $0.00525
- Fits in one request
- GPT-5.1-Codex-Max
- $0.00625
- Fits in one request
Gemini 3.6 Flash has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Gemini 3.6 Flash
- $0.0975
- Fits in one request
- GPT-5.1-Codex-Max
- $0.0925
- Fits in one request
GPT-5.1-Codex-Max 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 3.6 Flash
- $0.135
- Fits in one request
- GPT-5.1-Codex-Max
- $0.15
- Fits in one request
Gemini 3.6 Flash has the lower modeled cost
Costs use the listed standard API rates.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGemini 3.6 FlashGPT-5.1-Codex-Max
Context window
Maximum documented context; output-token limits may be lower.
Gemini 3.6 Flash
GPT-5.1-Codex-Max
API model ID
Gemini 3.6 Flash
gemini-3.6-flash
Google Gemini 3.6 Flash model documentationGPT-5.1-Codex-Max
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Gemini 3.6 Flash
$0.15 per 1M cached input tokens
Google Gemini API pricingGPT-5.1-Codex-Max
$0.125 per 1M cached input tokens
OpenAI GPT-5.1-Codex-Max model documentationDocumented inputs
Gemini 3.6 Flash
text, image, video, audio, pdf
Google Gemini 3.6 Flash model documentationGPT-5.1-Codex-Max
Not sourced
Documented outputs
Gemini 3.6 Flash
GPT-5.1-Codex-Max
Not sourced
Provider availability
Gemini 3.6 Flash
Generally Available · Gemini API, Google AI Studio
Google latest Gemini model guideGPT-5.1-Codex-Max
Not sourced
Reasoning profile
Gemini 3.6 Flash
Reasoning
GPT-5.1-Codex-Max
Reasoning
Weight access
Gemini 3.6 Flash
Proprietary
GPT-5.1-Codex-Max
Proprietary
License
Gemini 3.6 Flash
Proprietary
GPT-5.1-Codex-Max
Proprietary
Release date
Gemini 3.6 Flash
2026-07-21
GPT-5.1-Codex-Max
2025-11-19
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: $0.0975 vs $0.0925. Cache-heavy agent loop: $0.135 vs $0.15.
- Context tradeoff
- Gemini 3.6 Flash has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence9 rows
Agentic
Coding
deepSwe
Gemini 3.6 Flash49%SourceGPT-5.1-Codex-Max—Not directly comparable
cursorBench32
Gemini 3.6 Flash53.5%SourceGPT-5.1-Codex-Max—Not directly comparable
LiveCodeBench (Vals)
Gemini 3.6 Flash88.1%SourceGPT-5.1-Codex-Max—Not directly comparable
SWE-bench (Vals)
Gemini 3.6 Flash79.6%SourceGPT-5.1-Codex-Max—Not directly comparable
Vibe Code Bench
Gemini 3.6 Flash—GPT-5.1-Codex-Max22.17%SourceNot directly comparable
Knowledge
Frequently asked questions
Which is better, Gemini 3.6 Flash or GPT-5.1-Codex-Max?
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, Gemini 3.6 Flash or GPT-5.1-Codex-Max?
GPT-5.1-Codex-Max is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Gemini 3.6 Flash or GPT-5.1-Codex-Max?
GPT-5.1-Codex-Max is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Gemini 3.6 Flash or GPT-5.1-Codex-Max?
For the stated presets, chat costs $0.00525 on Gemini 3.6 Flash and $0.00625 on GPT-5.1-Codex-Max; repository review costs $0.0975 and $0.0925; the cache-heavy agent loop costs $0.135 and $0.15. Costs use the listed standard API rates.
Which has the larger context window, Gemini 3.6 Flash or GPT-5.1-Codex-Max?
Gemini 3.6 Flash has the larger documented context window: 1M, compared with 400K.
Related comparisons
Last updated September 4, 2026
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