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BenchLM
Data

GPT-5.3 Codex vs Muse Wonder

Updated October 12, 2026. Rank says Muse Wonder is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.

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Decision reading

Muse Wonder has the higher public point estimate, 70.44 versus 59.87. Their conditional score ranges overlap. These ranges do not establish rank confidence. 1 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.

Model A
OpenAI logo

OpenAI

59.87/100

Supported · Public rank #51

90% interval 52.5–67.3

Model B
Meta logo

Meta

70.44/100

Estimated · Public rank #16

Conditional range 56.1–84.8

Shared results
1
GPT-5.3 Codex only
10
Muse Wonder only
5
Like-for-like categories
1 / 8
Supported: GPT-5.3 Codex · Estimated: Muse Wonder. 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.

  • Coding work

    Code generation, repair, and software-engineering tasks

    Muse Wonder

    Muse Wonder has the higher public coding point estimate, 69.8 to 54.8, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

    Confidence: limited
  • Long documents

    Prompts that approach the documented context limit

    Muse Wonder

    Muse Wonder has the larger documented context window.

    Confidence: documented
  • Chat turn cost

    1K fresh input + 500 output tokens

    GPT-5.3 Codex

    GPT-5.3 Codex 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
  • Cache-heavy agent loop cost

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

    Muse Wonder

    Muse Wonder has the lower estimated token cost for this stated workload. GPT-5.3 Codex has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback
  • Repository review cost

    50K fresh input + 3K output tokens

    GPT-5.3 Codex

    GPT-5.3 Codex has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.

    Confidence: listed-rates
  • Agentic work

    Tool use, computer use, and multi-step task completion

    Not enough matched evidence

    Muse Wonder is not ranked on the public lane for agentic, so no winner is named for agentic.

    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.

54.8GPT-5.3 Codex69.8Muse Wonder

Like-for-like · BenchAlign v5.8

Muse Wonder has the higher coding point estimate. Conditional score ranges do not establish rank confidence.

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.

1 category rests 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.

A shared-evidence shape is not available.

BenchLM does not draw a radar or infer missing axes when the matched evidence is too sparse.

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.

Coding

Like-for-like
GPT-5.3 Codex
54.8
Supported · #31/148
Muse Wonder
69.8
Supported · #10/148
Basis
BenchAlign v5.8 lane · 7 vs 3 public rows
Reading
Muse Wonder leads · intervals overlap

Knowledge

Directional only
GPT-5.3 Codex
65.4
Estimated · #29/180
Muse Wonder
74.0
Supported · #12/180
Basis
BenchAlign v5.8 lane · 0 vs 1 public rows
Reading
Directional only

Agentic

Not comparable
GPT-5.3 Codex
55.6
Estimated · #35/123
Muse Wonder
Not ranked
Basis
BenchAlign v5.8 lane · 4 vs 2 public rows
Reading
Not comparable

Reasoning

Not comparable
GPT-5.3 Codex
83.1
Unranked · 2 rankable rows
Muse Wonder
81.3
Unranked · 2 rankable rows
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Multimodal

Not comparable
GPT-5.3 Codex
80.1
Unranked · 1 rankable row
Muse Wonder
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Multilingual

Not comparable
GPT-5.3 Codex
Not ranked
Muse Wonder
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Instruction following

Not comparable
GPT-5.3 Codex
92.6
#18/127
Muse Wonder
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Math

Not comparable
GPT-5.3 Codex
Not ranked
Muse Wonder
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 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-5.3 Codex
$0.00875
Fits in one request
Muse Wonder
$0.014
Fits in one request

GPT-5.3 Codex has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

GPT-5.3 Codex
$0.1295
Fits in one request
Muse Wonder
$0.26
Fits in one request

GPT-5.3 Codex 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-5.3 Codex
$0.525
Fits in one request
Cached input priced at the published list-input rate
Muse Wonder
$0.32
Fits in one request

Muse Wonder has the lower modeled cost

GPT-5.3 Codex 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.

Cached-input rate

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

GPT-5.3 Codex

Not published

Muse Wonder

$0.2 per 1M cached input tokens

Meta: Muse Wonder models and pricing

Provider availability

GPT-5.3 Codex

Generally Available · OpenAI Responses API

OpenAI model catalog

Muse Wonder

Not sourced

Reasoning profile

GPT-5.3 Codex

Reasoning

Muse Wonder

Reasoning

Weight access

GPT-5.3 Codex

Proprietary

Muse Wonder

Proprietary

License

GPT-5.3 Codex

Proprietary

Muse Wonder

Proprietary

Release date

GPT-5.3 Codex

2026-02-05

Muse Wonder

2026-10-12

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
Muse Wonder has the higher public point estimate, 70.44 versus 59.87. Their conditional score ranges overlap. These ranges do not establish rank confidence.
Workload cost
Repository review: $0.1295 vs $0.26. Cache-heavy agent loop: $0.525 vs $0.32.
Context tradeoff
Muse Wonder has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.

Questions

Which is better, GPT-5.3 Codex or Muse Wonder?

Muse Wonder has the higher public point estimate, 70.44 versus 59.87. 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-5.3 Codex or Muse Wonder?

Muse Wonder has the higher public coding point estimate, 69.8 to 54.8, with Supported evidence for both models. The conditional ranges do not establish rank confidence.

Which is better for agentic tasks, GPT-5.3 Codex or Muse Wonder?

Muse Wonder is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.

Which costs less, GPT-5.3 Codex or Muse Wonder?

For the stated presets, chat costs $0.00875 on GPT-5.3 Codex and $0.014 on Muse Wonder; repository review costs $0.1295 and $0.26; the cache-heavy agent loop costs $0.525 and $0.32. GPT-5.3 Codex has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, GPT-5.3 Codex or Muse Wonder?

Muse Wonder has the larger documented context window: 1M, compared with 400K.

Benchmark evidence

The full public result ledger is available for audit without forcing a wide desktop table onto a phone.

Browse raw public benchmark evidence16 rows

Agentic

  • Terminal-Bench 2.0

    GPT-5.3 Codex77.3%
    Source
    Muse Wonder—

    Not directly comparable

  • OSWorld-Verified

    GPT-5.3 Codex64.7%
    Source
    Muse Wonder—

    Not directly comparable

  • Gert Labs

    GPT-5.3 Codex57.47%
    Source
    Muse Wonder—

    Not directly comparable

  • JobBench

    GPT-5.3 Codex33.7%
    Source
    Muse Wonder70.5%
    Source

    Muse Wonder leads this result

  • Finance Agent v2

    GPT-5.3 Codex—
    Muse Wonder56.6%
    Source

    Not directly comparable

Coding

  • SWE-bench Verified

    GPT-5.3 Codex85%
    Source
    Muse Wonder—

    Not directly comparable

  • SWE-bench Pro

    GPT-5.3 Codex56.8%
    Source
    Muse Wonder—

    Not directly comparable

  • SWE-Rebench

    GPT-5.3 Codex58.2%
    Source
    Muse Wonder—

    Not directly comparable

  • Terminal-Bench 2.0

    GPT-5.3 Codex77.3%
    Source
    Muse Wonder—

    Not directly comparable

  • Vibe Code Bench

    GPT-5.3 Codex61.77%
    Source
    Muse Wonder—

    Not directly comparable

  • LiveCodeBench (Vals)

    GPT-5.3 Codex87.3%
    Source
    Muse Wonder—

    Not directly comparable

  • SWE-bench (Vals)

    GPT-5.3 Codex78.0%
    Source
    Muse Wonder—

    Not directly comparable

  • DeepSWE

    GPT-5.3 Codex—
    Muse Wonder78.8%
    Source

    Not directly comparable

  • ProgramBench

    GPT-5.3 Codex—
    Muse Wonder50.0%
    Source

    Not directly comparable

  • sweMarathon

    GPT-5.3 Codex—
    Muse Wonder53.1%
    Source

    Not directly comparable

Knowledge

  • HealthBench Professional

    GPT-5.3 Codex—
    Muse Wonder60.5%
    Source

    Not directly comparable

16 public results · 1 shared

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Last updated October 12, 2026