# Windsurf料金：2026年のすべてのプランの説明

Windsurf (formerly Codeium) is an AI coding IDE with a free tier, a Pro plan at $15/month (500 prompt credits), and a Teams plan at $35/seat/month. If you burn through credits fast or want to skip the subscription, RunAPI gives you access to the same underlying models — Claude, GPT-4o, Gemini — at 50% off official rates.

*Updated June 23, 2026 · RunAPI Editorial*

## Windsurfはいくらかかりますか？

Windsurf has three main tiers. The Free plan includes limited AI completions and chat per month with no credit card required — most developers who code daily will run out within a week or two. Pro costs $15/month and gives you 500 prompt credits; Cascade can take as many internal steps as it needs per prompt without burning extra credits. Teams is $35/seat/month with admin controls and centralized billing, but note that Teams no longer pools credits across seats — each member gets their own allocation. A separate option is bringing your own API key, which lets you choose any model and pay per token — RunAPI makes this 50% cheaper than going directly to Anthropic or OpenAI.

- **無料**: Limited AI completions and chat. No credit card needed. Most daily users hit the cap within a week or two.
- **Pro — $15/月**: 500 prompt credits per month. Cascade steps don't cost extra. Includes access to premium models like Claude 3.5 Sonnet and GPT-4o.
- **Teams — $35/シート/月**: Centralized billing and admin dashboard. Each seat gets its own credit allocation — credits are no longer pooled across the team.
- **APIキー（BYOK）**: Plug in your own API key and pay per token. Use RunAPI to cut the cost by 50% versus official provider rates. Top up only when you need it.

## Windsurfプラン比較

The table below shows what each Windsurf plan includes as of mid-2026. The Free plan is low enough that developers who code daily will hit the cap within a week or two. Pro gives you 500 prompt credits per month — each user prompt counts as one credit regardless of how many steps Cascade takes internally. Teams no longer pools credits; each seat gets its own allocation.

## WindsurfのはCursorおよびClaude Codeと価格を比較するとどうですか

Windsurf Pro at $15/month is $5 cheaper than Cursor Pro at $20/month — both give you 500 fast requests per month, which is the same basic structure. Claude Code Max at $100/month is a different category entirely: it’s a terminal-based agent, not an editor extension. If you’re burning through credits fast on Windsurf Pro, BYOK via RunAPI lets you top up at 50% off official rates instead of upgrading to a higher plan.

### Windsurf vs Cursor

Windsurf Pro is $5/month cheaper than Cursor Pro. Both support BYOK and cap you at roughly 500 fast requests per month. Cursor has a larger extension ecosystem; Windsurf’s Cascade agent handles multi-file edits without manual context selection.

### Windsurf vs Claude Code

Claude Code Max costs $100/month and runs in your terminal, not inside VS Code or JetBrains. Windsurf at $15/month is an editor-integrated tool. The two tools are not direct substitutes.

### RunAPIでのBYOKコスト

With BYOK via RunAPI, Claude 3.5 Sonnet costs roughly half what you would pay Anthropic directly. If you maxed out your Windsurf Pro credits and need more, pay-per-token is often cheaper than upgrading.


## Windsurf で自分のAPIキーを使用する方法

WindsurfはすべてのプランでBYOKをサポートしています。SettingsにAPIキーを貼り付けて使用するモデルを選択します。RunAPIはOpenAI互換エンドポイントを提供するため、ベースURLをRunAPIのエンドポイントに設定してRunAPIキーを使用します。これはRunAPIがサポートするすべてのモデル — Claude、GPT-4o、Gemini、Llamaなど — で機能します。RunAPIのサブスクリプション料金はありません。公式レートの50%で使用したトークンにのみ支払います。

### サブスクリプションロックインなし

Pay-per-token means you pay for what you actually use. No monthly minimum, no seat fee, no credits burning in the background.

### 同じモデル、半分のコスト

RunAPIはAnthropicとOpenAIの定価の50%で請求します。Claude 3.5 Sonnetの入力トークンは直接$3.00/Mに対してRunAPI経由では$1.50/Mです。

### OpenAI互換

ベースURLをRunAPIに設定すると、既存のコードまたはツール設定は変更なしで動作します。SDKの切り替えは不要です。


## WindsurfでRunAPIを使用する方法

1. **無料RunAPIアカウントを作成する** — runapi.aiにアクセスしてサインアップしてください。最初のAPIキーを取得するためにクレジットカードは不要です。
2. **APIキーをコピーする** — RunAPIダッシュボードでAPIキーを生成してください。キーページに表示されているベースURL — 次のステップで必要になります。
3. **Windsurf Settingsを開く** — Windsurfで、Settings > AI > API Keysに移動してください。使用したいモデルに一致するプロバイダーを選択します（ClaudeにはAnthropic、GPT-4oにはOpenAI）。
4. **RunAPIベースURLとキーを入力する** — RunAPIベースURLをエンドポイントフィールドに貼り付け、RunAPIキーをAPIキーフィールドに貼り付けてください。Windsurfはすべてのリクエストを50%オフで基盤となるプロバイダーにプロキシするRunAPIを通じて送信します。
5. **モデルを選択してテストする** — RunAPIで利用可能な任意のモデルを選択してください。チャットを開くか補完をトリガーして接続が機能することを確認してください。使用量は数秒以内にRunAPIダッシュボードに表示されます。

## Windsurf料金FAQ

### What happened to flow action credits?

Flow action credits are gone. Windsurf used to bill separately for each internal step Cascade took — every tool call, every file read counted against your flow credit balance. Now only your user prompts count. Cascade can run as many internal steps as it needs per prompt with no extra charge.

### I was on Pro Ultimate — what do I get now?

If you were on Pro Ultimate, Windsurf rolled you into the new Pro plan ($15/month, 500 prompt credits) and gave you 1,200 free add-on credits as a one-time delta. Some users on the old plan had 3,000+ flow actions and feel this is a downgrade — the credit math is different because flow actions and prompt credits aren’t 1-to-1.

### How many requests do I actually get per month?

Pro gives you 500 prompt credits per month. At 20 prompts a day, that’s 25 days of usage — you’ll run short at the end of the month. At 10 prompts a day, 500 credits lasts the full month comfortably. Add-on packs (250 credits for $10) roll over indefinitely, so you can top up without losing what you don’t use.

### Does Teams still have shared pooled credits?

No, Teams no longer pools credits into a shared bucket. Each seat gets its own credit allocation. If your team was on Teams specifically for the shared pool, this is a significant change — several Teams users flagged this as a reason to reconsider the plan.

### Do add-on credits expire?

Add-on prompt credit packs do not expire. You buy 250 credits for $10 and they roll over indefinitely until you use them. Monthly subscription credits (the 500 that come with Pro) reset each billing cycle and do not roll over.

### Can I set a spending cap so I don't get locked out?

Yes. You can set a maximum monthly budget for auto top-up. When your credits run low, Windsurf automatically adds a credit pack so you stay unblocked instead of getting locked out mid-session. You control the cap so you never get surprised by a large bill.

### Does RunAPI work with Cursor and Claude Code as well?

Yes. RunAPI is OpenAI-compatible and works with any tool that accepts a custom API endpoint and key. Cursor, Claude Code, Codex, and other AI editors all support BYOK configuration. You use one RunAPI key and one credit balance across all your tools — no need to manage separate provider accounts.

### What models are available through RunAPI?

RunAPI supports Claude 3.5 Sonnet, Claude 3.7 Sonnet, GPT-4o, GPT-4.1, Gemini 1.5 Pro, Llama 3.1, and a range of image, video, and audio generation models. The full model list is on the RunAPI pricing page. All text models are billed at 50% of the provider's published rate.