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OpenAI

GPT-4 1.5-nano

Complete specs, pricing, and benchmark data for GPT-4 1.5-nano by OpenAI. Last verified 2026-04-20.

JSON ModeFunctionsStreaming
Pricing

Input / 1M tokens

$0.100

Output / 1M tokens

$0.400

Context & Output

Context Window

128K

Max Output

4,096

TTFT

120ms

Speed

150 tok/s

Benchmarks

Arena ELO

1150

Coding ELO

1160

Reasoning ELO

1150

HumanEval

78

MMLU

78

MATH

50

GPQA

40

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Price History (Input $/M tokens)

Strengths
  • +Super cheap
  • +Very fast
  • +Large context
Limitations
  • -Limited reasoning
  • -Smallest model

Best For

Cost EffectiveFast Inference

Compare GPT-4 1.5-nano with...

vs Claude Opus 4vs Gemini 2.5 Provs o3vs DeepSeek R1vs o1vs Qwen 3 235B MoEvs Gemini Experimental 1206vs GPT-4.5vs DeepSeek R1 (Groq)vs Llama 4 Maverickvs DeepSeek R1 (Together)vs Grok 3
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