AI Models · Paid vs Paid

FIEmber-1 Paid vs AIAion 3.5 Paid

Ember-1 vs Aion 3.5 compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.

Ember-1 — full profile ›  ·  Aion 3.5 — full profile ›

Prices & specs refreshed from live data · olud.ai

Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.

FIEmber-1PaidFireworks
$3 /M input
$15 /M outputManaged API (no infra to run)
TypeProprietary
Context window1M tokens
MultimodalYes
Self-hostNo
AIAion 3.5PaidAionLabs
$3 /M input
$6 /M outputManaged API (no infra to run)
TypeProprietary
Context window262K tokens
MultimodalNo
Self-hostNo
Choose Aion 3.5 for the lower output price ($6/M vs $15/M). Choose Ember-1 if you need the larger 1M context window.

Ember-1 vs Aion 3.5 specs

SpecEmber-1Aion 3.5Winner
MakerFireworksAionLabs–
TypeProprietaryProprietary–
Context window1M tokens262K tokensFIEmber-1
Input price$3/M$3/M= Tie
Output price$15/M$6/MAIAion 3.5
Vision / multimodalYesNoFIEmber-1
Tool / function callingYesYes= Tie
Self-hostableNo (API only)No (API only)–
LicenseProprietaryProprietary–

Price gap & when to choose each

2.5×cheaper per output token

Aion 3.5 is ~2.5× cheaper than Ember-1 on output tokens ($6 vs $15 per M tokens).

FIChoose Ember-1 if…
  • You want frontier performance through a managed API
  • You need the longer 1M context window
  • You value reliability & ecosystem
  • You don't want to manage infrastructure
AIChoose Aion 3.5 if…
  • You want frontier performance through a managed API
  • You want the lower output price
  • You value reliability & ecosystem
  • You don't want to manage infrastructure

Feature comparison

CapabilityEmber-1Aion 3.5
Open weights (downloadable)✗✗
Self-hostable✗✗
Runs fully offline✗✗
Vision / multimodal✓✗
Tool / function calling✓✓
1M+ context window✓✗

How Ember-1 and Aion 3.5 score

🏆 Best value & openness: Ember-1 (3.1 vs 2.8 / 5)
CriterionEmber-1Aion 3.5
Cost-efficiency3.04.0
Context window5.04.0
Openness1.51.5
Self-hosting1.01.0
Multimodality5.03.5

Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.

What each model is

Ember-1 Paid

Fireworks · Proprietary

Ember-1 is a specialized reasoning model from Fireworks Research, built on [Kimi K3](https://openrouter.ai/moonshotai/kimi-k3). It is designed to make every token go further: it produces shorter reasoning traces, using roughly 40%...

Aion 3.5 Paid

AionLabs · Proprietary

Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple specialized models each...

Frequently asked questions

Ember-1 vs Aion 3.5 — which is cheaper?

Aion 3.5 is cheaper on output ($6/M vs $15/M).

Which has the larger context window?

Ember-1 offers the larger context window (1M tokens).

Ember-1 vs Aion 3.5 — which should I pick in 2026?

Choose Aion 3.5 for the lower output price ($6/M vs $15/M). Choose Ember-1 if you need the larger 1M context window.

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