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DeepSeek V4 Flash Fast vs GPT OSS 120B

DeepSeek V4 Flash Fast is cheaper on output tokens, while DeepSeek V4 Flash Fast offers a larger context window. Choose DeepSeek V4 Flash Fast or GPT OSS 120B based on the trade-off between cost, context, and the benchmarks that matter for your use case.

SpecDeepSeek V4 Flash FastGPT OSS 120B
ProviderCommandCodeNeon
Input / 1M tokens$0.28$0.15
Output / 1M tokens$0.56$0.60
Context window1M131K
Parameters—117B
Open weightsYesYes
ReleasedApr 2026Aug 2025
LiveBench score—46.4
Aider Polyglot score—41.8
DeepSeek V4 Flash Fast details →GPT OSS 120B details →

FAQ

Is DeepSeek V4 Flash Fast or GPT OSS 120B cheaper?

DeepSeek V4 Flash Fast is cheaper on output tokens ($0.56 vs $0.60 per 1M).

Which has the larger context window, DeepSeek V4 Flash Fast or GPT OSS 120B?

DeepSeek V4 Flash Fast has the larger context window (1M tokens).

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.