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Migrate from Fireworks AI to Railwail

Move from Fireworks AI to Railwail. Same OpenAI-compatible API, 200+ models on one key.

Railwail1 min read

Created with AI assistance.

Migrate from Fireworks AI to Railwail
01 · Key takeaways

TL;DR — Switch in Under 5 Minutes

  • Both APIs are OpenAI-compatible
  • Plus access to closed-source frontier models (Claude, GPT-4o, Gemini) on the same key

Try it on Railwail

Run GPT-4o

OpenAI$3.00/1M inBilled by actual usage

OpenAI's most capable multimodal model. Excellent for complex reasoning, coding, and creative tasks.

Open playgroundGet API key

Models in this article

02

Why Move Off Fireworks AI?

Fireworks AI is well-known for fast inference on open-source LLMs. The trade-offs are the lack of closed-source frontier models (Claude, GPT-4o, Gemini) in the catalog. Railwail adds the closed-source models — all behind one API key.

03

Step 1 — Get a Railwail API Key

Sign up at railwail.com and generate a key. Sign up with Google to get 10 free credits ($0.10), usable 24 hours after sign-up.

04

API Endpoint Mapping

Fireworks endpoint → Railwail equivalent
FireworksRailwailNotes
POST /inference/v1/chat/completionsPOST /api/v1/chat/completionsIdentical
POST /inference/v1/embeddingsPOST /api/v1/embeddingsIdentical
POST /inference/v1/image_generation/{model}POST /api/v1/images/generationsOpenAI-style
POST /inference/v1/audio/transcriptionsPOST /api/v1/audio/transcriptionsWhisper
GET /inference/v1/modelsGET /api/v1/models200+ models
05

Model Mapping

Fireworks model → Railwail
FireworksLive on RailwailRailwailNotes
accounts/fireworks/models/deepseek-v3$0.36/1M indeepseek-v4-flashdeepseek-v4-flashSuccessor
accounts/fireworks/models/deepseek-r1$1.584/1M indeepseek-v4-prodeepseek-v4-proSuccessor
06

Why Railwail Over Fireworks

  • Same OpenAI-compatible API
  • Adds Claude, GPT-4o, Gemini to the catalog — Fireworks has no closed-source
  • Built-in playground for cross-model comparison
07

FAQ

Can I bring my own LoRA?

Custom LoRAs (Fireworks' multi-LoRA feature) are not currently hosted on Railwail. You can keep them on Fireworks and use Railwail for everything else.

How does streaming compare?

Both APIs stream OpenAI-format SSE chunks.

What about embeddings?

POST /api/v1/embeddings accepts identical request shapes.

08

Next Steps

  • Sign up at railwail.com
  • Generate an API key
  • Update baseURL to https://railwail.com/api/v1
  • Replace long Fireworks model paths with short Railwail slugs
  • Read the reference at railwail.com/docs
  • Compare per-token pricing at railwail.com/pricing
Live

Models in this article

Live prices from Railwail's current rules, October 7, 2026.

  • GPT-4oOpenAI
    $3.00 / 1M input tokens$12.00/1M out
    1K in + 500 out tokens: ≈ $0.0090
    Try
  • WhisperOpenAI
    ≈ $0.0034 per run
    Try
  • DeepSeek V4 FlashDeepSeek
    $0.36 / 1M input tokens$1.44/1M out
    1K in + 500 out tokens: ≈ $0.0011
    Try
  • DeepSeek V4 ProDeepSeek
    $1.584 / 1M input tokens$4.752/1M out
    1K in + 500 out tokens: ≈ $0.0040
    Try

≈ billed by actual tokens or GPU time

Next step

Try GPT-4o on Railwail

Sign in with Google for 10 free credits (usable 24 hours after sign-up, runs up to 2 credits), or top up from $5.00. Unused balance does not expire.

More sign-up options (email, GitHub)
Browse models
TopicsFireworks AIMigrationLlamaOpen SourceFunction Calling

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