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Model A
GPT-4.1

OpenAI

42.02/100

Supported · Public rank #177

90% interval 26.357.8

GPT-4.1 vs Inkling-Small

Updated September 10, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.

Thinking Machines Lab logo
Model B
Inkling-Small

Thinking Machines Lab

59.25/100

Supported · Public rank #69

90% interval 52.466.1

Decision reading

Inkling-Small has the higher public score estimate, 59.25 versus 42.02, but the 90% score intervals overlap. Treat that as a lead, not a settled winner.

2 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

    Inkling-Small

    Inkling-Small 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

    Inkling-Small

    Inkling-Small has the lower estimated token cost for this stated workload. GPT-4.1 has no published cached-input rate, so cached tokens use its listed input rate.

    Confidence: rate-fallback

Show secondary and unsupported calls
  • Repository review cost

    50K fresh input + 3K output tokens

    Inkling-Small

    Inkling-Small 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-4.1 is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.

    Confidence: limited

  • Agentic work

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

    Not enough matched evidence

    GPT-4.1 is 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

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
2
GPT-4.1 only
5
Inkling-Small only
23
Like-for-like categories
1 / 8

2 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.

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.

Knowledge

Like-for-like
GPT-4.1
39.8
Supported · #133/183
Inkling-Small
56.5
Supported · #46/183
Basis
BenchAlign lane · 2 vs 6 public rows
Reading
Inkling-Small leads · intervals overlap

Coding

Directional only
GPT-4.1
41.8
Estimated · #106/151
Inkling-Small
43.8
Supported · #97/151
Basis
BenchAlign lane · 1 vs 6 public rows
Reading
Directional only

Instruction following

Directional only
GPT-4.1
50.5
#82/123
Inkling-Small
89.6
#25/123
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Directional only

Agentic

Not comparable
GPT-4.1
Not ranked
Inkling-Small
36.9
Supported · #128/152
Basis
BenchAlign lane · 1 vs 5 public rows
Reading
Not comparable

Reasoning

Not comparable
GPT-4.1
67.9
Unranked · 2 rankable rows
Inkling-Small
42.7
Unranked · 3 rankable rows
Basis
Provisional lane · 0 vs 1 weighted rows
Reading
Not comparable

Math

Not comparable
GPT-4.1
28.1
Unranked · 2 rankable rows
Inkling-Small
76.9
Unranked · 2 rankable rows
Basis
Provisional lane · 2 vs 2 weighted rows
Reading
Not comparable

Multilingual

Not comparable
GPT-4.1
Not ranked
Inkling-Small
Not ranked
Basis
Provisional lane · 0 vs 0 weighted rows
Reading
Not comparable

Multimodal

Not comparable
GPT-4.1
50.2
Unranked · 1 rankable row
Inkling-Small
48.8
#39/48
Basis
Provisional lane · 0 vs 2 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

GPT-4.1
$0.006
Fits in one request
Inkling-Small
$0.0013
Fits in one request

Inkling-Small has the lower modeled cost

Costs use the listed standard API rates.

Repository review

50K fresh input + 3K output tokens

GPT-4.1
$0.124
Fits in one request
Inkling-Small
$0.03332
Fits in one request

Inkling-Small 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-4.1
$0.52
Fits in one request
Cached input priced at the published list-input rate
Inkling-Small
$0.0492
Fits in one request

Inkling-Small has the lower modeled cost

GPT-4.1 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.

GPT-4.1

1M

Inkling-Small

1M

API model ID

GPT-4.1

Not sourced

Inkling-Small

Not sourced

Cached-input rate

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

GPT-4.1

Not published

Inkling-Small

$0.116 per 1M cached input tokens

Documented inputs

GPT-4.1

Not sourced

Inkling-Small

Not sourced

Documented outputs

GPT-4.1

Not sourced

Inkling-Small

Not sourced

Provider availability

GPT-4.1

Not sourced

Inkling-Small

Not sourced

Reasoning profile

GPT-4.1

Non-Reasoning

Inkling-Small

Hybrid

Weight access

GPT-4.1

Proprietary

Inkling-Small

Open Weight

License

GPT-4.1

Proprietary

Inkling-Small

Open Weight

Release date

GPT-4.1

2025-04-14

Inkling-Small

2026-07-30

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
Inkling-Small has the higher public score estimate, 59.25 versus 42.02, but the 90% score intervals overlap.
Workload cost
Repository review: $0.124 vs $0.03332. Cache-heavy agent loop: $0.52 vs $0.0492.
Context tradeoff
Both models list 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 evidence30 rows

Agentic

  • Gert Labs

    GPT-4.125.65%
    Source
    Inkling-Small

    Not directly comparable

  • Terminal-Bench 2.0

    GPT-4.1
    Inkling-Small64.7%
    Source

    Not directly comparable

  • BrowseComp

    GPT-4.1
    Inkling-Small77.4%
    Source

    Not directly comparable

  • MCP Atlas

    GPT-4.1
    Inkling-Small79.6%
    Source

    Not directly comparable

  • Toolathlon-Verified

    GPT-4.1
    Inkling-Small54.4%
    Source

    Not directly comparable

  • Terminal-Bench 2.1 (Vals)

    GPT-4.1
    Inkling-Small55.1%
    Source

    Not directly comparable

Coding

  • SWE-bench Verified

    GPT-4.154.6%
    Source
    Inkling-Small80.2%
    Source

    Inkling-Small leads this result

  • SWE-bench Pro

    GPT-4.1
    Inkling-Small55.9%
    Source

    Not directly comparable

  • Terminal-Bench 2.0

    GPT-4.1
    Inkling-Small64.7%
    Source

    Not directly comparable

  • SciCode

    GPT-4.1
    Inkling-Small48.7%
    Source

    Not directly comparable

  • LiveCodeBench (Vals)

    GPT-4.1
    Inkling-Small85.9%
    Source

    Not directly comparable

  • SWE-bench (Vals)

    GPT-4.1
    Inkling-Small82.2%
    Source

    Not directly comparable

Reasoning

  • ARC-AGI-2

    GPT-4.1
    Inkling-Small40.1%
    Source

    Not directly comparable

  • CritPt

    GPT-4.1
    Inkling-Small8.3%
    Source

    Not directly comparable

Knowledge

  • MMLU

    GPT-4.190.2%
    Source
    Inkling-Small

    Not directly comparable

  • GPQA

    GPT-4.166.3%
    Source
    Inkling-Small89.5%
    Source

    Inkling-Small leads this result

  • GPQA-D

    GPT-4.1
    Inkling-Small89.5%
    Source

    Not directly comparable

  • HLE

    GPT-4.1
    Inkling-Small47.8%
    Source

    Not directly comparable

  • HLE w/o tools

    GPT-4.1
    Inkling-Small31.6%
    Source

    Not directly comparable

  • GPQA Diamond (Vals)

    GPT-4.1
    Inkling-Small83.6%
    Source

    Not directly comparable

  • MMLU-Pro (Vals)

    GPT-4.1
    Inkling-Small85.6%
    Source

    Not directly comparable

Math

  • FrontierMath v2 (Tiers 1-3)

    GPT-4.15.517%
    Source
    Inkling-Small

    Not directly comparable

  • FrontierMath v2 (Tier 4)

    GPT-4.10.000%
    Source
    Inkling-Small

    Not directly comparable

  • AIME26

    GPT-4.1
    Inkling-Small95.5%
    Source

    Not directly comparable

  • HMMT Feb 2026

    GPT-4.1
    Inkling-Small90.2%
    Source

    Not directly comparable

Multimodal

  • MMMU-Pro

    GPT-4.1
    Inkling-Small74%
    Source

    Not directly comparable

  • CharXiv

    GPT-4.1
    Inkling-Small81.3%
    Source

    Not directly comparable

  • CharXiv w/o tools

    GPT-4.1
    Inkling-Small77.4%
    Source

    Not directly comparable

Instruction following

  • IFEval

    GPT-4.187.4%
    Source
    Inkling-Small

    Not directly comparable

  • IFBench

    GPT-4.1
    Inkling-Small82.2%
    Source

    Not directly comparable

Frequently asked questions

Which is better, GPT-4.1 or Inkling-Small?

Inkling-Small has the higher public score estimate, 59.25 versus 42.02, but the 90% score intervals overlap. The higher estimate is not a decisive winner because the uncertainty ranges overlap.

Which is better for coding, GPT-4.1 or Inkling-Small?

Inkling-Small scores higher for coding on the public lane, 43.8 to 41.8. GPT-4.1 is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.

Which is better for agentic tasks, GPT-4.1 or Inkling-Small?

GPT-4.1 is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.

Which costs less, GPT-4.1 or Inkling-Small?

For the stated presets, chat costs $0.006 on GPT-4.1 and $0.0013 on Inkling-Small; repository review costs $0.124 and $0.03332; the cache-heavy agent loop costs $0.52 and $0.0492. GPT-4.1 has no published cached-input rate, so cached tokens use its listed input rate.

Which has the larger context window, GPT-4.1 or Inkling-Small?

Both models list the same context window, 1M.

Related comparisons

Last updated September 10, 2026

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