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Model A
o1

OpenAI

47.89/100

Estimated · Public rank #154

90% interval 38.853.6

o1 vs o1-pro

Updated September 4, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload. This is a same-family comparison, so migration details appear when the source data supports them.

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Model B
o1-pro

OpenAI

45.5/100

Estimated · Public rank #164

90% interval 34.057.0

Decision reading

o1 has the higher public score estimate, 47.89 versus 45.5, but the 90% score intervals overlap. Treat that as a lead, not a settled winner.

1 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.

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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

    o1

    o1 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

    o1

    o1 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

    O1-pro 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

    O1 and o1-pro are not ranked on the public lane for agentic, so no winner is named for agentic.

    Confidence: limited

  • Long documents

    Prompts that approach the documented context limit

    No clear pick

    The documented context windows are equal.

    Confidence: documented

  • 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. o1 does not fit this workload in one request. o1-pro does not fit this workload in one request. o1 has no published cached-input rate, so cached tokens use its listed input rate. o1-pro has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback

What is actually comparable

Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.

Shared results
1
o1 only
3
o1-pro 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.

Agentic

Not comparable
o1
Not ranked
o1-pro
Not ranked
Basis
BenchAlign lane · 0 vs 0 public rows
Reading
Not comparable

Coding

Not comparable
o1
46.1
Estimated · #101/183
o1-pro
Not ranked
Basis
BenchAlign lane · 0 vs 0 public rows
Reading
Not comparable

Reasoning

Not comparable
o1
66.5
Unranked · 2 rankable rows
o1-pro
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Knowledge

Not comparable
o1
46.6
Supported · #106/181
o1-pro
Not ranked
Basis
BenchAlign lane · 2 vs 1 public rows
Reading
Not comparable

Math

Not comparable
o1
32.6
Unranked · 1 rankable row
o1-pro
Not ranked
Basis
Provisional lane · 1 vs 0 weighted rows
Reading
Not comparable

Multilingual

Not comparable
o1
Not ranked
o1-pro
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Multimodal

Not comparable
o1
Not ranked
o1-pro
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Instruction following

Not comparable
o1
85.7
#39/120
o1-pro
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
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.

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

o1
$0.045
Fits in one request
o1-pro
$0.45
Fits in one request

o1 has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

o1
$0.93
Fits in one request
o1-pro
$9.30
Fits in one request

o1 has the lower modeled cost

Costs use the listed standard API rates.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

o1
$3.90
Does not fit in one request
Cached input priced at the published list-input rate
o1-pro
$39.00
Does not fit in one request
Cached input priced at the published list-input rate

o1 does not fit this workload in one request. o1-pro does not fit this workload in one request. o1 has no published cached-input rate, so cached tokens use its listed input rate. o1-pro has no published cached-input rate, so cached tokens use its listed input rate.

Specification differences

Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.

Context window

Maximum documented context; output-token limits may be lower.

o1

200K

o1-pro

200K

API model ID

o1

Not sourced

o1-pro

Not sourced

Cached-input rate

A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.

o1

Not published

o1-pro

Not published

Documented inputs

o1

Not sourced

o1-pro

Not sourced

Documented outputs

o1

Not sourced

o1-pro

Not sourced

Provider availability

o1

Not sourced

o1-pro

Not sourced

Reasoning profile

o1

Reasoning

o1-pro

Reasoning

Weight access

o1

Proprietary

o1-pro

Proprietary

License

o1

Proprietary

o1-pro

Proprietary

Release date

o1

2024-12-01

o1-pro

2024-12-01

If you are choosing between sibling variants
Deployment change
Both entries list OpenAI as the provider. Confirm endpoint, model ID, limits, and feature support before switching.
Quality signal
o1 has the higher public score estimate, 47.89 versus 45.5, but the 90% score intervals overlap.
Workload cost
Repository review: $0.93 vs $9.30. Cache-heavy agent loop: $3.90 vs $39.00.
Context tradeoff
Both models list 200K.

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 evidence4 rows

Knowledge

  • MMLU

    o191.8%
    Source
    o1-pro

    Not directly comparable

  • GPQA

    o175.7%
    Source
    o1-pro79%
    Source

    o1-pro leads this result

Math

  • FrontierMath v2 (Tiers 1-3)

    o19.310%
    Source
    o1-pro

    Not directly comparable

Instruction following

  • IFEval

    o192.2%
    Source
    o1-pro

    Not directly comparable

Frequently asked questions

Which is better, o1 or o1-pro?

o1 has the higher public score estimate, 47.89 versus 45.5, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.

Which is better for coding, o1 or o1-pro?

O1-pro is not ranked on the public lane for coding, so no winner is named for coding.

Which is better for agentic tasks, o1 or o1-pro?

O1 and o1-pro are not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.

Which costs less, o1 or o1-pro?

For the stated presets, chat costs $0.045 on o1 and $0.45 on o1-pro; repository review costs $0.93 and $9.30; the cache-heavy agent loop costs $3.90 and $39.00. o1 does not fit this workload in one request. o1-pro does not fit this workload in one request. o1 has no published cached-input rate, so cached tokens use its listed input rate. o1-pro has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, o1 or o1-pro?

Both models list the same context window, 200K.

Related comparisons

Last updated September 4, 2026

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