OpenAI
OpenAI
LLMProprietary Commercial API Verified Architecture & Specs$0.5/1M in · $1.5/1M out

GPT-3.5-turbo

GPT-3.5-turbo is a llm model from OpenAI with Proprietary parameters, supporting a 16,385-token context window, with text modalities. Hosted/proprietary model; upstream API availability and pricing should be checked against the linked provider documentation.

Technical Architecture & Execution Specifications
Architecture Overview

GPT-3.5-turbo

GPT-3.5-turbo is a llm model from OpenAI with Proprietary parameters, supporting a 16,385-token context window, with text modalities. Hosted/proprietary model; upstream API availability and pricing should be checked against the linked provider documentation.

Supported Modalities
text

Hardware & Execution ParametersLLM

Total Parameter CountProprietary
Active Parameters (MoE)Dense Architecture
Context Window Capacity16,385 tokens
Model Weights FootprintCloud Hosted API
Distribution LicenseProprietary Commercial API
Standard API Pricing (1M Tokens)$0.5 in / $1.5 out
Model Heritage & Evolutionary Lineage
GPT v3.5

Genealogical Graph & Evolutionary Provenance

Tracing foundational base architecture ancestry, architectural successors, scale siblings, and reasoning distillation derivatives.

Ancestral Base / Predecessor
Root Pretrained Origin
Active SelectionMar 2023
GPT-3.5-turbo
Proprietary16,385 CtxCurrent Spec
AI Model Architecture & Intelligence

Architecture Engineering & Capability Deep-Dive

An objective architectural evaluation of GPT-3.5-turbo by OpenAI, analyzing underlying compute dynamics, memory constraints, and deployment economics.

Topology & Attention Mechanics

Features an Omni multimodal unified encoder capable of test-time compute scaling via explicit Chain-of-Thought (CoT) reasoning tokens.

Architecture Type:Advanced Transformer

Evaluation Profile & Reasoning

Exhibits frontier-tier behavior in reasoning and coding. World-class step-by-step mathematical extraction.

Domain Specialty:LLM

LLM Hardware Sizing & Serving

Served via scalable API endpoints guaranteeing high tokens-per-second concurrency and enterprise SLAs.

KV Cache Mgmt: PagedAttention / FlashAttention-3
Hosting Type:Proprietary Commercial API

Inference Economics & Workflows

Reasoning tokens dynamically scale compute on hard problems. Expect higher output costs and varied TTFB, offset by massive reductions in hallucination rates.

Enterprise Fit:Production Ready
Production Trade-Offs & Capability Balance

Architectural Strengths vs. Considerations

An objective balance sheet analyzing the operational advantages and production constraints of deploying GPT-3.5-turbo.

Key Architectural Strengths

  • Omni multimodal unified encoder with test-time compute scaling (CoT reasoning tokens) maxes out complex problem solving.
  • Exceptional adherence to structured JSON schemas accelerates integration into deterministic enterprise pipelines.
  • Demonstrated Artificial Analysis Coding Index evaluation score of 10.7% in verified benchmarks.

Operational Considerations

  • Autoregressive CoT reasoning tokens can increase Time-to-First-Byte (TTFB) and inflate output token budgets unpredictably.
LLM Hardware Sizing & Runtime Compatibility

Inference Runtimes & Hardware Sizing

Deployment targets, inference engines, and memory requirements for GPT-3.5-turbo.

Recommended Hardware Profile:
Cloud Hosted API (Zero Local VRAM)
Supported Inference Engines
Vendor REST API

Primary managed cloud endpoint

Official
OpenRouter

Unified multi-provider gateway

Supported
Amazon Bedrock / GCP

Private cloud enterprise integration

Enterprise
OpenAI SDK

Standard chat completions client

Compatible
Precision & Quantization Formats
Cloud PrecisionManaged Serving

Vendor-optimized floating point precision (FP8/BF16)

Prompt CachingPrefix Cache

Up to 50–90% cost reduction on repeated system prompts

LLM Benchmark Database & Performance Metrics

1 Tested

Standardized evaluation results across reasoning, agentic coding, computer use, and alignment.

Flagship Headline MetricsIndustry SOTA Standard
General / Other

Artificial Analysis Coding Index

10.7%index
0%100%
Artificial Analysis Coding Index
index
10.7%
Commercial Rates & Inference Costs

API & Deployment Pricing

Standard API consumption rates per million tokens as indexed from official laboratory pricing documentation.

Usage TierRate / Unit
Prompt / Input Tokens$0.5 / 1M tokens
Completion / Output Tokens$1.5 / 1M tokens
Inference Cost & ROI Engine
Official API Rate
Prompt / Input Volume:50M Tokens / mo
1M500M1,000M
Generated / Output Volume:10M Tokens / mo
1M250M500M
Estimated Monthly Spend
$40.00/ mo
Input (50M @ $0.50/1M):$25.00
Output (10M @ $1.50/1M):$15.00
Cloud GPU Breakeven Ratio
RunPod RTX 4090 ($316/mo)0.13x spend
Lambda 1x H100 ($1,800/mo)0.02x spend
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Parameters:Open Weights
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Integration & Deployment
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ.get("OPENAI_KEY", "EMPTY"),
    base_url="https://api.openai.com/v1"
)

response = client.chat.completions.create(
    model="openai-gpt-3.5-turbo",
    messages=[{"role": "user", "content": "Explain quantum superposition in 2 sentences."}]
)
print(response.choices[0].message.content)
Frequently Asked Questions

Frequently Asked Questions about GPT-3.5-turbo

Essential facts, architectural specs, hardware constraints, and pricing answers for GPT-3.5-turbo.

GPT-3.5-turbo is a proprietary API model and cannot be run locally. It requires no local VRAM.

Primary Sources & Access Repositories

All technical specifications, parameter distributions, context architectures, and benchmark evaluations for GPT-3.5-turbo are audited against primary source release documentation, research whitepapers, and verified vendor API endpoints.

api id:openai/gpt-3.5-turbo
knowledge cutoff:2021-09-01