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Text · Released Apr 2026

ByteDance Seed 2.0 Lite

Balanced Seed 2.0 reasoning model with tool calling and image input at a lower price than Pro.

From ByteDance, Seed 2.0 Lite is a cloud text model. It is multimodal: alongside a text prompt it accepts images, then replies with generated text. Its context window handles up to 262K input tokens and up to 131K output tokens, and it supports adjustable reasoning effort for harder problems. Generation can be tuned with system instructions, temperature, and top-p sampling. It runs through OpenRouter and ByteDance using your own API key, from $0.25 per million input tokens.

Modality
Text
Model ID
bytedance/seed-2.0-lite
Specs
Released
5 months ago (Apr 2026)
Pricing
$0.25 / 1M in · $2.00 / 1M out
Inputs
Text, Images
Context window
262K in · 131K out
Reasoning
Adjustable effort
Controls
System prompt, Temperature, Top-p
Samples

Examples

Generated with Seed 2.0 Lite via OpenRouter. The same three prompts run against every text model in the catalog, shown verbatim, so the only thing that changes between two models’ answers is the model.

Short answer30 / 50 words

Explain what an API is to someone who has never written code. Do not use a restaurant or waiter analogy. Plain prose only — no headings, bullet points, or markdown formatting. Maximum 50 words.

An API is a set of simple, pre-defined rules that lets separate software apps share data and work together automatically, without you needing to manually move information between different tools.

Medium answer83 / 150 words

A two-person startup is deciding whether to build their own user authentication or use a hosted provider. Give them a clear recommendation, then the single strongest argument against your own recommendation. Plain prose only — no headings, bullet points, or markdown formatting. Maximum 150 words.

For your two-person startup, use a hosted user authentication provider rather than building your own. Auth requires ongoing security patching, compliance checks, MFA support, and breach mitigation that would eat weeks of your limited engineering time better spent building the unique core value of your product. The single strongest counterargument is that hosted providers carry meaningful long-term lock-in: pricing can jump sharply as you scale, and migrating auth later requires risky, user-facing credential resets that can drive noticeable churn if not executed perfectly.

Long answer205 / 190–220 words

Write a briefing for a non-technical executive explaining why their company's spending on AI is hard to predict, and what they can do about it. Cover at least three distinct causes. Plain prose only — no headings, bullet points, or markdown formatting. Write exactly 205 words.

Your company’s AI spending is far harder to forecast than traditional software costs for three key, interconnected reasons that rarely come up with legacy tooling. First, most AI work relies on iterative experimentation, where early pilot results often require unplanned investments in custom training data, fine-tuning work, or even full project scrappage if outputs fail to hit required performance bars, with no way to lock in costs at project kickoff. Second, operational overhead scales dynamically rather than being fixed: inference costs are tied directly to usage volume, so unplanned cross-team adoption of a tool originally budgeted for one department can drive 2-3x projected monthly spend in weeks, with no static per-seat rate that holds steady as use cases expand. Third, fast shifting regulatory and vendor landscapes introduce unplanned costs overnight, from new data residency rules forcing migrations to more expensive regional model instances to unexpected vendor price hikes for features teams have already come to rely on. To address this, implement weekly lightweight usage dashboards that flag overspend triggers early, tie AI project funding to staged performance milestones instead of lump sum allocations, and require teams to submit documented usage guardrails before rolling out any new AI tool broadly, while leaving a small contingency buffer.

About the creator

ByteDance

ByteDance's AI labs ship the Seedream image models and the Seedance video models, among other Doubao-branded research.

www.bytedance.com ↗
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