Agentic
Not comparable- GPT-5.5
- 63.9
- Supported · #15/151
- o4-mini (high)
- Not ranked
- Basis
- BenchAlign lane · 13 vs 0 public rows
- Reading
- Not comparable
GPT-5.5 vs o4-mini (high)
Updated September 4, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
GPT-5.5 has the higher public score, 73.27 versus 49.57, and the 90% score intervals do not overlap.
2 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
GPT-5.5
GPT-5.5 has the larger documented context window.
Confidence: documented
Show secondary and unsupported calls
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
O4-mini (high) 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
O4-mini (high) is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-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. o4-mini (high) does not fit this workload in one request. o4-mini (high) has no comparable published API token rate.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
36 GPT-5.5 only
2 Shared
- Shared results
- 2
- GPT-5.5 only
- 36
- o4-mini (high) only
- 0
- 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- GPT-5.5
- 67.7
- Supported · #8/183
- o4-mini (high)
- Not ranked
- Basis
- BenchAlign lane · 9 vs 0 public rows
- Reading
- Not comparable
Reasoning
Not comparable- GPT-5.5
- 63.5
- #15/22
- o4-mini (high)
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Knowledge
Not comparable- GPT-5.5
- 73.3
- Supported · #7/181
- o4-mini (high)
- Not ranked
- Basis
- BenchAlign lane · 6 vs 0 public rows
- Reading
- Not comparable
Math
Not comparable- GPT-5.5
- 69.6
- Unranked · 3 rankable rows
- o4-mini (high)
- 43.2
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 2 vs 2 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- GPT-5.5
- Not ranked
- o4-mini (high)
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- GPT-5.5
- 71.3
- #19/48
- o4-mini (high)
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- GPT-5.5
- 92.9
- #7/120
- o4-mini (high)
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | GPT-5.5 | o4-mini (high) | Basis | Reading |
|---|---|---|---|---|
| Agentic | 63.9Supported · #15/151 | Not ranked | Not comparableBenchAlign lane · 13 vs 0 public rows | Not comparable |
| Coding | 67.7Supported · #8/183 | Not ranked | Not comparableBenchAlign lane · 9 vs 0 public rows | Not comparable |
| Reasoning | 63.5#15/22 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Knowledge | 73.3Supported · #7/181 | Not ranked | Not comparableBenchAlign lane · 6 vs 0 public rows | Not comparable |
| Math | 69.6Unranked · 3 rankable rows | 43.2Unranked · 2 rankable rows | Not comparableProvisional lane · 2 vs 2 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 71.3#19/48 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Instruction following | 92.9#7/120 | 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.
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.
FrontierMath v2 (Tier 4)
Math
FrontierMath v2 (Tiers 1-3)
Math
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-5.5
- $0.02
- Fits in one request
- o4-mini (high)
- API rate not published
- Fits in one request
o4-mini (high) has no comparable published API token rate.
Repository review
50K fresh input + 3K output tokens
- GPT-5.5
- $0.34
- Fits in one request
- o4-mini (high)
- API rate not published
- Fits in one request
o4-mini (high) has no comparable published API token rate.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- GPT-5.5
- $0.5
- Fits in one request
- o4-mini (high)
- API rate not published
- Does not fit in one request
- Cached-input rate unavailable
o4-mini (high) does not fit this workload in one request. o4-mini (high) has no comparable published API token rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGPT-5.5o4-mini (high)
Context window
Maximum documented context; output-token limits may be lower.
GPT-5.5
o4-mini (high)
200K
API model ID
GPT-5.5
gpt-5.5
OpenAI pricingo4-mini (high)
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
GPT-5.5
$0.5 per 1M cached input tokens
OpenAI pricingo4-mini (high)
No comparable hosted API rate
Documented inputs
GPT-5.5
Not sourced
o4-mini (high)
Not sourced
Documented outputs
GPT-5.5
Not sourced
o4-mini (high)
Not sourced
Provider availability
GPT-5.5
Not sourced
o4-mini (high)
Not sourced
Reasoning profile
GPT-5.5
Reasoning
o4-mini (high)
Reasoning
Weight access
GPT-5.5
Proprietary
o4-mini (high)
Proprietary
License
GPT-5.5
Proprietary
o4-mini (high)
Proprietary
Release date
GPT-5.5
2026-04-23
o4-mini (high)
2025-04-16
If you already use one of these models
- Deployment change
- Both entries list OpenAI as the provider. Confirm endpoint, model ID, limits, and feature support before switching.
- Quality signal
- GPT-5.5 has the higher public score, 73.27 versus 49.57, and the 90% score intervals do not overlap.
- Workload cost
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- GPT-5.5 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 evidence38 rows
Agentic
Terminal-Bench 2.0
GPT-5.582%Sourceo4-mini (high)—Not directly comparable
CyberGym
GPT-5.581.8%Sourceo4-mini (high)—Not directly comparable
BrowseComp
GPT-5.584.4%Sourceo4-mini (high)—Not directly comparable
OSWorld-Verified
GPT-5.578.7%Sourceo4-mini (high)—Not directly comparable
MCP Atlas
GPT-5.575.3%Sourceo4-mini (high)—Not directly comparable
Toolathlon
GPT-5.555.6%Sourceo4-mini (high)—Not directly comparable
τ²-bench results
GPT-5.598%Sourceo4-mini (high)—Not directly comparable
Gert Labs
GPT-5.572.93%Sourceo4-mini (high)—Not directly comparable
ResearchClawBench
GPT-5.517.0%Sourceo4-mini (high)—Not directly comparable
OSWorld 2.0
GPT-5.513.0%Sourceo4-mini (high)—Not directly comparable
JobBench
GPT-5.542.7%Sourceo4-mini (high)—Not directly comparable
ExploitGym
GPT-5.513.4%Sourceo4-mini (high)—Not directly comparable
Terminal-Bench 2.1 (Vals)
GPT-5.576.4%Sourceo4-mini (high)—Not directly comparable
Coding
SWE-bench Pro
GPT-5.558.6%Sourceo4-mini (high)—Not directly comparable
Terminal-Bench 2.0
GPT-5.582.0%Sourceo4-mini (high)—Not directly comparable
Vibe Code Bench
GPT-5.569.85%Sourceo4-mini (high)—Not directly comparable
React Native Evals
GPT-5.584.7%Sourceo4-mini (high)—Not directly comparable
cursorBench31
GPT-5.559.2%Sourceo4-mini (high)—Not directly comparable
cursorBench32
GPT-5.558.4%Sourceo4-mini (high)—Not directly comparable
FrontierCode 1.1 Main
GPT-5.543.0%Sourceo4-mini (high)—Not directly comparable
LiveCodeBench (Vals)
GPT-5.585.3%Sourceo4-mini (high)—Not directly comparable
SWE-bench (Vals)
GPT-5.582.6%Sourceo4-mini (high)—Not directly comparable
Reasoning
Knowledge
GPQA
GPT-5.593.6%Sourceo4-mini (high)—Not directly comparable
GPQA-D
GPT-5.593.6%Sourceo4-mini (high)—Not directly comparable
HLE
GPT-5.552.2%Sourceo4-mini (high)—Not directly comparable
HLE w/o tools
GPT-5.541.4%Sourceo4-mini (high)—Not directly comparable
GPQA Diamond (Vals)
GPT-5.593.2%Sourceo4-mini (high)—Not directly comparable
MMLU-Pro (Vals)
GPT-5.588.1%Sourceo4-mini (high)—Not directly comparable
Math
FrontierMath (legacy)
GPT-5.551.7%Sourceo4-mini (high)—Not directly comparable
FrontierMath v2 (Tiers 1-3)
Shared sourceGPT-5.551.700%o4-mini (high)24.828%GPT-5.5 leads this result
FrontierMath v2 (Tier 4)
Shared sourceGPT-5.535.400%o4-mini (high)6.250%GPT-5.5 leads this result
Multimodal
Frequently asked questions
Which is better, GPT-5.5 or o4-mini (high)?
GPT-5.5 has the higher public score, 73.27 versus 49.57, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.
Which is better for coding, GPT-5.5 or o4-mini (high)?
O4-mini (high) is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, GPT-5.5 or o4-mini (high)?
O4-mini (high) is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, GPT-5.5 or o4-mini (high)?
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Which has the larger context window, GPT-5.5 or o4-mini (high)?
GPT-5.5 has the larger documented context window: 1M, compared with 200K.
Related comparisons
Last updated September 4, 2026
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