Translate Japanese games with DeepSeek — LLM quality at a fraction of the cost

RuneTranslate now ships DeepSeekas a first-class translation provider. If you translate a lot of Japanese games and watch the LLM bill, this is the one to read about: DeepSeek gives you genuine large-language-model translation — context-aware, character-voice-preserving — at a fraction of the price of GPT-4o or Claude. Bring your own key, pick a model, and translate.

It sits in Settings → Providersunder "Cloud · API key", right next to OpenAI and Anthropic, and works with every RuneTranslate feature — provider routing, the AI refiner, glossaries, and translation memory.

What DeepSeek is (and why it's cheap)

DeepSeek is an OpenAI-compatiblechat-completions API. That matters practically: RuneTranslate talks to it with the same robust request/parse engine it uses for OpenAI and self-hosted models, so you get the same batching, retry-with-backoff, and JSON-mode parsing — just pointed at DeepSeek's endpoint with your key.

The reason it's cheap is the pricing, not a downgrade in the product. DeepSeek prices its models several times below the big Western labs, so a whole visual novel that would cost a few dollars on GPT-4o typically comes out to cents on DeepSeek.

The two models

deepseek-v4-flash — the default

Best for:almost everything. Fast, extremely cheap, and strong on Japanese → English (and 30+ other targets). This is the recommended default in RuneTranslate — the model id is pre-filled for you.

Cost: roughly $0.14 per million input tokens and $0.28 per million output. For a typical 10,000-line game that is a few cents, not a few dollars.

deepseek-v4-pro — when you want the ceiling

Best for:dense, stylized dialogue where you want the best reading — eroge, character-driven visual novels, anything with heavy slang or wordplay. Still cheap by LLM standards (about $0.44 / $0.87 per million input/output).

The model field is a free-text input with these two as suggestions, so if DeepSeek ships a newer model id you can just type it — no app update needed.

Quality on Japanese games

Because it's a real LLM (not statistical MT), DeepSeek reads the surrounding lines and keeps register consistent — formal NPC vs colloquial party member — the same context-awareness that makes GPT-4o and Claude good at visual novels. It handles CJK source text natively and is comfortable with stylized speech instead of flattening everyone to textbook English.

As with every LLM, the last 10% is still a hand-edit pass in the RuneTranslate editor — and on Supporter / Pro those hand-fixes land in your translation memory so the same line comes back instantly, free, in the next game. Pair DeepSeek with a glossary to lock character and place names before the batch ever reaches the provider.

Set it up in a minute

1. Get a key at platform.deepseek.com/api_keys and add a little credit.
2. In RuneTranslate open Settings → Providers, pick DeepSeekunder "Cloud · API key", paste the key, and press Test.
3. Leave the model as deepseek-v4-flash (or type deepseek-v4-pro for the higher tier) and set DeepSeek as your default provider with the ★ star.
4. Open a project, auto-detect the engine, and translate. Your key stays encrypted on your own machine — RuneTranslate never sees it.

Free vs paid

DeepSeek is available on every tier— it's your key, your cost. On the free tier it's throttled the same way as the other cloud LLMs (fewer parallel batches, a short pause between them), so a big game runs a few times slower. Supporter and Pro remove the throttle for full-speed translation. Either way, the DeepSeek bill is tiny.

So which provider should you use?

• Cheapest LLM quality, any genre:DeepSeek v4-flash. It's the new default answer to "I want context-aware translation without paying GPT/Claude prices."
• Best reading on a hard VN:deepseek-v4-pro or Claude — and with DeepSeek the cost difference barely matters.
• Mix and route: on Supporter+, keep dialogue on DeepSeek and send item/menu strings to free Google via provider routing — a whole game for pennies.

Download RuneTranslateand try DeepSeek on a real game — it works on every engine RuneTranslate supports, and the free tier lets you test it end-to-end before you commit.