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GPT-5.6 Terra

Balanced GPT-5.6 model for capable, cost-efficient everyday work

Source-linked gpt-terra Closed weights Released 2026-07-09
API data Report
Input modalitiesT
Output modalitiesT
Input price$2.5/1M tokens
Output price$15/1M tokens
Context window1.05M
Max output128K
Overview

Capabilities and specifications

✓ Reasoning Yes
✓ Tool calling Yes
✓ Structured output Yes
✓ Attachments Yes
✓ Vision input Yes
× Open weights No
Creator
OpenAI
Model family
gpt-terra
Knowledge cutoff
2026-02-16
License
Not documented
Release date
2026-07-09
Model ID
openai/gpt-5.6-terra
Inference availability

Provider pricing and availability

Provider-specific identifiers, limits, and prices per million tokens.

Report a price
Providers offering GPT-5.6 Terra
ProviderProvider model IDContextInputOutputCache readCapabilitiesSource
Snowflake Cortex openai-gpt-5.6-terra 1.05M Not listed Not listed - ReasoningToolsJSON Docs
Kenari gpt-5-6-terra 1.05M Not listed Not listed - ReasoningToolsJSON Docs
OpenRouter openai/gpt-5.6-terra 1.05M $1 $6 $0.1 ReasoningToolsJSON Docs
routing.run gpt-5.6-terra 1M $1.5 $9 - ReasoningToolsJSON Docs
Xpersona gpt-5.6-terra 372K $1.5 $2 $0.15 ReasoningToolsJSON Docs
Merge Gateway openai/gpt-5.6-terra 1.05M $1.875 $11.25 $0.188 ReasoningToolsJSON Docs
Vercel AI Gateway openai/gpt-5.6-terra 1.05M $2 $12 $0.2 ReasoningToolsJSON Docs
CrossModel openai/gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
ZenMux openai/gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
OpenAI gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
LLM Gateway gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Abacus gpt-5.6-terra 1M $2.5 $15 $0.25 ReasoningToolsJSON Docs
OpenCode Zen gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
AI-ROUTER gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
GitHub Copilot gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Cloudflare AI Gateway openai/gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Azure gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Amazon Bedrock openai.gpt-5.6-terra 272K $2.5 $15 $0.25 ReasoningToolsJSON Docs
Databricks databricks-gpt-5-6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Azure Cognitive Services gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
AIHubMix gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Ofox openai/gpt-5.6-terra 1.05M $2.5 $15 $0.25 ReasoningToolsJSON Docs
Venice AI openai-gpt-56-terra 1M $3.125 $18.75 $0.312 ReasoningToolsJSON Docs

Capability badges appear only when the provider catalog explicitly lists support.

Serving quality

Performance and reliability

Observed serving measurements stay separate from model specifications and are never estimated from price or model size.

Throughput Not reported

Generation speed; higher is faster.

Latency / TTFT Not reported

Time until the first output token arrives.

Uptime Not reported

Successful requests over a measured period.

Performance varies by inference provider, region, and load. Provider-level measurements appear only when a source reports them.

Published evaluations

Benchmarks

Raw results remain attached to their original source and version.

Benchmark registry
Agentic Index - Unversioned - indexTop 7 reported models
Claude Opus 5
55.3
GPT-5.6 Sol
54.0
Anthropic: Claude Fable 5 (batch)
52.8
Claude Fable 5
52.8
Kimi K3
50.1
GPT-5.6 Terra
47.4
Anthropic: Claude Opus 4.8 (batch)
47.2
Agents' Last Exam - Unversioned - scoreTop 3 reported models
GPT-5.6 Sol
52.7
GPT-5.6 Terra
50.4
GPT-5.6 Luna
50.3
Artificial Analysis Coding Agent Index - 1.1 - index score - CodexTop 3 reported models
GPT-5.6 Sol
80.0
GPT-5.6 Terra
77.4
GPT-5.6 Luna
74.6
Artificial Analysis Intelligence Index - 4.1 - index scoreTop 3 reported models
GPT-5.6 Sol
58.9
GPT-5.6 Terra
55.0
GPT-5.6 Luna
51.2
BrowseComp - Unversioned - accuracyTop 7 reported models
GPT-5.6 Sol
90.4
GPT-5.5 Pro
90.1
GPT-5.4 Pro
89.3
GPT-5.6 Terra
87.5
Claude Sonnet 5
84.7
GPT-5.5
84.4
MiniMax-M3
83.5
Coding Index - Unversioned - indexTop 7 reported models
Claude Opus 5
78.0
GPT-5.6 Sol
77.4
GPT-5.6 Terra
76.7
Anthropic: Claude Fable 5 (batch)
76.5
Claude Fable 5
76.5
Kimi K3
76.2
OpenAI: GPT-5.5 (batch)
74.9
DeepSWE - 1.1 - resolve rateTop 4 reported models
GPT-5.6 Sol
72.7
GPT-5.6 Terra
69.6
GPT-5.6 Luna
67.2
Muse Spark 1.1
53.3
FrontierMath - v2 - accuracyTop 3 reported models
GPT-5.6 Sol
89.0
GPT-5.6 Terra
84.9
GPT-5.6 Luna
78.6
GPQA Diamond - Unversioned - accuracyTop 7 reported models
GPT-5.6 Sol
94.6
GPT-5.4 Pro
94.4
Gemini 3.1 Pro Preview
94.3
Claude Opus 4.7
94.2
GPT-5.5
93.6
GPT-5.6 Terra
92.9
GPT-5.4
92.8
Intelligence Index - Unversioned - indexTop 8 reported models
Claude Opus 5
60.7
Anthropic: Claude Fable 5 (batch)
59.9
Claude Fable 5
59.9
GPT-5.6 Sol
58.9
Kimi K3
57.1
Anthropic: Claude Opus 4.8 (batch)
55.7
Anthropic: Claude Opus 4.8
55.7
GPT-5.6 Terra
55.0
MMMU Pro - Unversioned - accuracyTop 7 reported models
Gemini 3.5 Flash
83.6
GPT-5.6 Sol
83.0
GPT-5.5
81.2
GPT-5.4
81.2
GPT-5.6 Terra
80.7
Gemini 3.1 Pro Preview
80.5
GPT-5.6 Luna
78.4
OSWorld - 2.0 - success rateTop 3 reported models
GPT-5.6 Sol
62.6
GPT-5.6 Terra
50.2
GPT-5.6 Luna
45.6
SWE-Bench Pro - Unversioned - resolve rateTop 7 reported models
Claude Fable 5
80.3
Claude Opus 4.8
69.2
Grok 4.5
64.7
GPT-5.6 Sol
64.6
Claude Opus 4.7
64.3
GPT-5.6 Terra
63.4
Claude Sonnet 5
63.2
Terminal-Bench - 2.1 - success rateTop 7 reported models
GPT-5.6 Sol
88.8
Claude Fable 5
88.0
GPT-5.6 Terra
87.4
GPT-5.6 Luna
84.7
Grok 4.5
83.3
Muse Spark 1.1
80.0
LongCat-2.0
70.8
Toolathlon - Unversioned - success rateTop 6 reported models
GPT-5.6 Sol
58.0
Gemini 3.5 Flash
56.5
GPT-5.5
55.6
GPT-5.6 Luna
53.4
GPT-5.6 Terra
53.1
Step 3.7 Flash
49.5
Catalog activity

Recent record changes

Detected changes from successful source imports.

Full change log
Price Completion6.0 → 15.0
Price Prompt1.0000000000000002 → 2.5
Price Completion15.0 → 6.0
Price Prompt2.5 → 1.0000000000000002
Price Completion7.5 → 15.0
Price Prompt1.25 → 2.5
Price Completion15.0 → 7.5
Price Prompt2.5 → 1.25
Public API

Use this record

Fetch the complete source-linked model record without an API key.

API documentation
Endpoint
GET https://www.modelbench.lol/api/v1/models/openai/gpt-5.6-terra
curl
curl "https://www.modelbench.lol/api/v1/models/openai/gpt-5.6-terra"