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Solar Pro 4

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

Pricing — 1 offering(s)

Upstage

Input tokens

  • $0.09 / 1M tokens (input) Current 2026-09-11 → 2026-10-10
    Launch promotion, time-limited: $0.09/1M input from 2026-09-11 until 2026-10-11 00:00 UTC, per Upstage's…

    Launch promotion, time-limited: $0.09/1M input from 2026-09-11 until 2026-10-11 00:00 UTC, per Upstage's published promotion schedule. The list price applies from 2026-10-11.

  • $0.30 / 1M tokens (input) Future 2026-10-11

Output tokens

  • $0.36 / 1M tokens (output) Current 2026-09-11 → 2026-10-10
    Launch promotion, time-limited: $0.36/1M output from 2026-09-11 until 2026-10-11 00:00 UTC, per Upstage's…

    Launch promotion, time-limited: $0.36/1M output from 2026-09-11 until 2026-10-11 00:00 UTC, per Upstage's published promotion schedule. Earlier launch windows were free, then $0.12/1M.

  • $1.20 / 1M tokens (output) Future 2026-10-11

    List price ($1.20/1M output) from 2026-10-11, after the launch promotion ends.

Cached input tokens

  • $0.018 / 1M tokens (cached input) Current 2026-09-11 → 2026-10-10
  • $0.06 / 1M tokens (cached input) Future 2026-10-11

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

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

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Capability profile

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

tool use Moderate

Positioned by Upstage as an "Agentic LLM built for multi-step real work: tool calling, terminal tasks, and long-document reasoning" (upstage.ai pricing card). No independent agentic benchmark in this registry yet.

context window Strong

524,288 tokens (OpenRouter listing), 4x Solar Pro 3's 128K.

multilingual Strong

Upstage's Solar line is optimised for Korean, with English and Japanese support; carried over from Solar Pro 3 and not separately benchmarked for Pro 4 here.

cost efficiency Strong

$0.30 / 1M input, $1.20 / 1M output list (upstage.ai/pricing); $0.09 / $0.36 during the launch promo to 2026-10-10.

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

Operator guidance

Upstage's current flagship: the migration path for Solar Pro 3, which shuts down on 2026-10-30. Pick it when Korean-language quality or a first-party/on-prem Upstage deployment matters, or for long-context agent work at the $0.30/$1.20 price point. For English-only agent work, compare with MiniMax M3 and DeepSeek V4.1 Flash at the same list price.

Use cases

Limitations

Citations