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Head-to-head comparison

Intern S2 Mobius vs KAT-Coder-Air V2.5

Intern S2 Mobius (Internlm) and KAT-Coder-Air V2.5 (Kuaishou) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 17 August 2026

As of 17 August 2026, Intern S2 Mobius holds the stronger ModelCap Index position (#140 vs #142); and Intern S2 Mobius ships open weights.

Which should you choose?

Choose Intern S2 Mobius if…

  • you want the stronger overall ModelCap Index position — #140 against #142 (22.5 vs 22.5 points).
  • you want to self-host: Intern S2 Mobius ships open weights while KAT-Coder-Air V2.5 is api only.
  • you want the more recently listed model — Intern S2 Mobius was listed 29 July 2026, KAT-Coder-Air V2.5 10 July 2026.

Choose KAT-Coder-Air V2.5 if…

  • you want provider choice — 1 listed API providers against 0.

Intern S2 Mobius vs KAT-Coder-Air V2.5: specs, pricing and context

Specification comparison of Intern S2 Mobius and KAT-Coder-Air V2.5
FieldIntern S2 MobiusInternlmKAT-Coder-Air V2.5Kuaishou
ModelCap Index position#140#142
Index score22.522.5
EvidenceEstimatedEstimated
Input price / 1M tokensUnlisted$0.15
Output price / 1M tokensUnlisted$0.60
Context window— tokens256K tokens
Max output tokens—80K
API providers listed01
Weight accessOpen weightsAPI only
Input modalitiesText, ImageText
First listed29 July 202610 July 2026
PublisherInternlmKuaishou

Evidence: global corpus prior · leave-one-anchor-out calibrated · global corpus prior · leave-one-anchor-out calibrated. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Intern S2 Mobius vs KAT-Coder-Air V2.5

Neither model has a published result on a public benchmark board ModelCap tracks yet.

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Intern S2 Mobius vs KAT-Coder-Air V2.5: common questions

Is Intern S2 Mobius better than KAT-Coder-Air V2.5?

Intern S2 Mobius ranks higher on the ModelCap Index as of 17 August 2026: #140 against #142. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it.

Is Intern S2 Mobius cheaper than KAT-Coder-Air V2.5?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Intern S2 Mobius or KAT-Coder-Air V2.5?

Both publish a —-token context window.

Which is better for coding, Intern S2 Mobius or KAT-Coder-Air V2.5?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Intern S2 Mobius and KAT-Coder-Air V2.5 open-weight models?

Intern S2 Mobius: Open weights. KAT-Coder-Air V2.5: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Intern S2 Mobius and KAT-Coder-Air V2.5?

ModelCap currently lists 0 API providers for Intern S2 Mobius and 1 for KAT-Coder-Air V2.5, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Intern S2 Mobius vs KAT-Coder-Air V2.5 comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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