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Solar Mini 4

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upstage/solar-mini-4 · by Upstage · mixture-of-experts

Pricing — 1 offering(s)

Upstage

Input tokens

  • $0.03 / 1M tokens (input) Current 2026-09-22 → 2026-10-10
    Launch promotion, window 1 of 2 (70% off): $0.03/1M input from 2026-09-22 05:00 UTC until 2026-10-11 00:00…

    Launch promotion, window 1 of 2 (70% off): $0.03/1M input from 2026-09-22 05:00 UTC until 2026-10-11 00:00 UTC, per Upstage's published promotion schedule.

  • $0.05 / 1M tokens (input) Future 2026-10-11 → 2026-10-22
    Launch promotion, window 2 of 2 (50% off): $0.05/1M input from 2026-10-11 00:00 UTC until 2026-10-23 00:00…

    Launch promotion, window 2 of 2 (50% off): $0.05/1M input from 2026-10-11 00:00 UTC until 2026-10-23 00:00 UTC. Upstage's on-page notice gives no end date; the end comes from its published promotion schedule.

  • $0.10 / 1M tokens (input) Future 2026-10-23

Output tokens

  • $0.12 / 1M tokens (output) Current 2026-09-22 → 2026-10-10
    Launch promotion, window 1 of 2 (70% off): $0.12/1M output from 2026-09-22 05:00 UTC until 2026-10-11 00:00…

    Launch promotion, window 1 of 2 (70% off): $0.12/1M output from 2026-09-22 05:00 UTC until 2026-10-11 00:00 UTC, per Upstage's published promotion schedule.

  • $0.20 / 1M tokens (output) Future 2026-10-11 → 2026-10-22
    Launch promotion, window 2 of 2 (50% off): $0.20/1M output from 2026-10-11 00:00 UTC until 2026-10-23 00:00…

    Launch promotion, window 2 of 2 (50% off): $0.20/1M output from 2026-10-11 00:00 UTC until 2026-10-23 00:00 UTC. Upstage's on-page notice gives no end date; the end comes from its published promotion schedule.

  • $0.40 / 1M tokens (output) Future 2026-10-23

    List price ($0.40/1M output) from 2026-10-23, after the launch promotion ends.

Cached input tokens

  • $0.003 / 1M tokens (cached input) Current 2026-09-22 → 2026-10-10
  • $0.005 / 1M tokens (cached input) Future 2026-10-11 → 2026-10-22
  • $0.01 / 1M tokens (cached input) Future 2026-10-23

Showing the active price and any recorded history. Full pricing history is available via the paid API — see API docs.

See how Solar Mini 4 fits into a cost-aware routing setup

See how →

Capability profile

How Solar Mini 4 rates across core capability dimensions, with the task-level evidence behind each rating.

tool use Moderate

Tool calling, parallel tool calling and structured outputs are supported (Upstage docs). Upstage reports 22.3% on AutomationBench-AA and 47.2 on τ³-Banking in its launch post. Vendor-reported; no anchor agentic benchmark (BrowseComp, OSWorld) is published.

context window Strong

512K per Upstage (524,288 tokens on OpenRouter), up to 128K output.

multilingual Strong

Upstage docs: Korean, English and Japanese input and output, with "fluent Korean alongside strong English and Japanese". Not separately benchmarked here.

cost efficiency Strong

$0.10 / 1M input, $0.40 / 1M output, $0.01 cached input at list (upstage.ai/pricing); 70% off to 2026-10-10, then 50% off to 2026-10-22.

Ratings are estimated — limited independent data is available for this model.

Operator guidance

Upstage's low-cost agent model, a step below Solar Pro 4 at a third of its list price. Pick it for high-volume tool-calling and structured-output steps, especially with Korean or Japanese text. Escalate to Solar Pro 4 for harder multi-step work. At the same input price, compare with GPT-6 Luna and Step 3.5 Flash.

Use cases

Limitations

Citations