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o3 Pro vs Relace Apply 3

Updated October 21, 2026. 0 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace o3 Pro Replace Relace Apply 3
o3 ProOpenAI
Coding
No data
Overall
21.9
Output $/M
$80.00
Relace Apply 3Relace
Coding
No data
Overall
No data
Output $/M
$1.25
vs $80.00 vs $1.25 per 1M output tokens. Relace Apply 3 is 64.0x cheaper.

Decision reading

Neither model has a coding score yet, so the two cannot be ranked on coding.

Compare them on price, context and the boards below.

Model Ao3 ProOpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BRelace Apply 3RelaceNot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
0
o3 Pro only
11
Relace Apply 3 only
0
Like-for-like categories
0 of 9

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

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
o3 Pro not benchmarked, Relace Apply 3 not benchmarked.
Widest category
No category has a result for both models.
Widest single gap
No benchmark has a result for both models.
Output price
o3 Pro $80.00 against Relace Apply 3 $1.25 per million output tokens, 64.0x apart.
Context window
o3 Pro takes 200K tokens, Relace Apply 3 256K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

CodingDirectional onlySix of these boards feed the Vibe Coding Index2 boards, none shared
Coding benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Aider polyglot84.9%Not measuredOnly o3 Pro measured
WeirdML58.2%Not measuredOnly o3 Pro measured
Neither model has a result on the other 36 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Intelligence benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
AA Intelligence Index21.9Not measuredOnly o3 Pro measured
Epoch Capabilities Index147.3Not measuredOnly o3 Pro measured
Agentic workNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Agentic work benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Neither model has a result on 39 boards here
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
Reasoning benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
GPQA Diamond (Artificial Analysis run)84.5%Not measuredOnly o3 Pro measured
ARC-AGI59.3%Not measuredOnly o3 Pro measured
ARC-AGI-24.9%Not measuredOnly o3 Pro measured
Neither model has a result on the other 18 boards here
MathNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Math benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Neither model has a result on 13 boards here
KnowledgeNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Knowledge benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Neither model has a result on 17 boards here
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Web design benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Neither model has a result on 9 boards here
GeneralDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
General benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
DTBench86.9%Not measuredOnly o3 Pro measured
LMCA38.5%Not measuredOnly o3 Pro measured
Fiction.LiveBench97.2%Not measuredOnly o3 Pro measured
Creative writing (Lech Mazur)84.4%Not measuredOnly o3 Pro measured
Neither model has a result on the other 42 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for o3 Pro and Relace Apply 3
Benchmarko3 ProRelace Apply 3Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

o3 Pro$0.060Fits in one request
Relace Apply 3$0.0015Fits in one request

Relace Apply 3 costs less

Repository review

50K input + 3K output tokens

o3 Pro$1.24Fits in one request
Relace Apply 3$0.046Fits in one request

Relace Apply 3 costs less

Agent loop

200K input + 10K output tokens

o3 Pro$4.80Exceeds the context window
Relace Apply 3$0.182Fits in one request

Relace Apply 3 costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of o3 Pro and Relace Apply 3
SpecificationOpenAI o3 ProRelace Apply 3
MakerOpenAIRelace
WeightsNo public weights listedNo public weights listed
ReleasedJune 10, 2025September 26, 2025
Context window200K256K
Input $/Mtok$20.00$0.85
Output $/Mtok$80.00$1.25
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it00
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is o3 Pro better than Relace Apply 3 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Compare them on price, context and the boards below.

Which is cheaper, o3 Pro or Relace Apply 3?

o3 Pro costs $20.00 per million input tokens and $80.00 per million output tokens; Relace Apply 3 costs $0.85 and $1.25. Cost per solved task is known for neither of them.

Which has the bigger context window, o3 Pro or Relace Apply 3?

Relace Apply 3, with 256K tokens against 200K.

How many benchmarks is the o3 Pro vs Relace Apply 3 comparison based on?

0 benchmarks have a result for both models as of October 21, 2026. o3 Pro's coding index rests on 0 independent benchmarks and Relace Apply 3's on 0. Where only one model has a result, the page says so instead of naming a winner.

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