Head-to-head comparison
Seed-2.0-Lite (ByteDance Seed) and UI-TARS 7B (ByteDance) 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, Seed-2.0-Lite holds the stronger ModelCap Index position (#125 vs #127); UI-TARS 7B is 10× cheaper per output token ($0.20/1M vs $2.00/1M); Seed-2.0-Lite offers the longer context window (262K vs 128K tokens); and UI-TARS 7B ships open weights.
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.
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.
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Seed-2.0-Lite ranks higher on the ModelCap Index as of 17 August 2026: #125 against #127. 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.
UI-TARS 7B is cheaper on output tokens: $0.20/1M against $2.00/1M. Input tokens are $0.25/1M for Seed-2.0-Lite and $0.10/1M for UI-TARS 7B. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.
Seed-2.0-Lite has the larger context window: 262K tokens against 128K.
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.
Seed-2.0-Lite: API only. UI-TARS 7B: Open weights. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.
ModelCap currently lists 1 API provider for Seed-2.0-Lite and 1 for UI-TARS 7B, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.
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.