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  5. OpenAI o3vsRiverflow V2 Fast
Updated Feb 2026

OpenAI o3vsRiverflow V2 Fast

Riverflow V2 Fast is the newer model, released after OpenAI o3.

OpenAI o3 and Riverflow V2 Fast compared across 2 shared prompts
SpecOpenAI o3Riverflow V2 Fast
Input price$10/M tokens—
Output price$40/M tokens—
Context window—8K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedApr 2025Feb 2026
Our Verdict
OpenAI o3
OpenAI o3
Riverflow V2 Fast
Riverflow V2 FastRunner-up

Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier, major provider backing.

Too close to call
API pricing

Cost per 1M tokens

OpenAI o3
Input
$10.00
Output
$40.00
Riverflow V2 Fast
Input
—
Output
—
Where to run it

2 hosts

OpenAI o31 host
HostInOutContextUptime
OpenAI$2.00 in·$8.00 out·200k·100% up
Riverflow V2 Fast1 host
HostInOutContextUptime
SSourceful$0 in·$0 out·8k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.

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Rival
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