GPT-5.6 Terra
Balanced enterprise workhorse tier of the 5.6 family, combining 1M context with competitive $2/$8 token rates and 84% SWE-bench resolution.
1,000k
~750k words input
$2 / $8
Prompt / Completion per 1M
84 % resolved
SWE-bench Verified
Cloud Managed
Zero local VRAM
Holistic Capability Distribution
Normalized 0-100 rating vectors balanced across intelligence, throughput, and economics.
Verified LLM Benchmarks
Empirical evaluations across academic reasoning, software engineering, agentic execution, and human preference.
Inference Latency & Generation Throughput
Empirical telemetry benchmarking generation throughput (Tokens/Second) and Time to First Token (TTFT).
Measured under concurrent production load
p95 latency: 820 ms
Across 4,100 monitored requests
Architectural Strengths vs. Operational Considerations
An objective technical balance sheet analyzing deployment advantages and production constraints.
Key Architectural Strengths
- Unbeatable enterprise value ($2 / $8 per 1M tokens) with 1M context.
- 84.0% resolution on SWE-bench Verified.
- Fast 92 tps token generation.
Operational Considerations
- Top-tier autonomous research is best left to GPT-5.6 Sol or GPT-6 Astra.
Hardware & Execution Parameters
Genealogical Provenance
Enterprise workhorse model in the 5.6 generation.
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GPT-5.6 Terra
Architecture Engineering & Capability Deep-Dive
Topology & Attention Mechanics
Balanced dense model trained for enterprise software refactoring and API synthesis.
Evaluation Profile & Reasoning Capabilities
Reliable structured data output, tool calling, and codebase search.
Inference Economics & Cost Optimization
$2 / $8 per 1M tokens.
Primary Production Workloads & Suitability
Cloud Deployment Architecture & Hardware Sizing
Cloud Deployment Architecture
Distributed enterprise serving infrastructure, autoscaling semantics, and runtime execution profile.
Proprietary commercial model hosted on managed multi-region clusters with automatic autoscaling, high availability, and prompt prefix caching.
Multi-Tenant Cloud API
Continuous autoscaling with regional failover
0 GB Local VRAM
Inference executed on hyperscaler accelerator clusters
1,000k tokens
Supported with automated KV cache prefix compression
SDK Installation
Official Repositories & Papers
Compare Showdowns
GPT-5.6 Terra vs GPT-5.6 Sol
Compare GPT-5.6 Terra against GPT-5.6 Sol's verified benchmarks, context window, and pricing.
GPT-5.6 Terra vs GPT-5.6 Luna
Compare GPT-5.6 Terra against GPT-5.6 Luna's verified benchmarks, context window, and pricing.
GPT-5.6 Terra vs OpenAI Decisions
Compare GPT-5.6 Terra against OpenAI Decisions's verified benchmarks, context window, and pricing.
GPT-5.6 Terra vs GPT-3.5 Turbo
Compare GPT-5.6 Terra against GPT-3.5 Turbo's verified benchmarks, context window, and pricing.
Commercial Token Rates & Cost Estimator
$2.00 / 1M
Standard prompt context ingestion
$8.00 / 1M
Generated completion & thinking tokens
$0.20 / 1M
Re-used prompt prefix context
Monthly Production Cost Simulator
$432.00
Includes prompt caching
-$108.00
Saved via prefix context caching
Comparable Foundation Architectures
Alternative foundation models with comparable intelligence benchmarks, context windows, and deployment profiles.
GPT-5.6 Sol
July 2026 solar flagship model representing OpenAI's primary frontier intelligence tier, featuring 1M context, 89.8% on SWE-bench Verified, and enhanced agent synthesis.
GPT-5.6 Luna
Ultra-fast low-latency lunar tier of the 5.6 family, achieving 73% on SWE-bench Verified at sub-120ms latency and $0.25/$1.00 economics across 500k context.
OpenAI Decisions
OpenAI Decisions is OpenAI's dedicated high-throughput decision-making API powered by GPT-6 Luna, accessed via the POST /v1/decisions endpoint. Designed for agent routing, automated content moderation, and classification, it processes typed questions (predicates, categorical choices, and rubric scores) roughly 10x faster than standard generation, billed at $0.10 per million input tokens with zero output-token fees.
GPT-3.5 Turbo
OpenAI's foundational conversational model that launched the ChatGPT era, optimized for fast dialogue, summary generation, and lightweight JSON tasks.
SDK Installation & API Integration
import OpenAI from 'openai';
const client = new OpenAI();
const completion = await client.chat.completions.create({
model: 'gpt-5.6-terra',
messages: [{ role: 'user', content: 'Migrate this database schema to PostgreSQL 17.' }],
});
console.log(completion.choices[0].message.content);Frequently Asked Questions about GPT-5.6 Terra
Engineering specifications, VRAM sizing, commercial licensing terms, token economics, and empirical benchmark evaluations.
Terra represents the balanced enterprise workhorse tier, optimizing speed, cost, and high intelligence.