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GLM 5.3 FlashX Legal vs GPT-6.1 Terra

Detailed technical comparison between GLM 5.3 FlashX Legal (Zhipu AI) and GPT-6.1 Terra (OpenAI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.

⚡ Executive Summary & Verdict

Comparison Snapshot

GLM 5.3 FlashX Legal: 0 WinsvsGPT-6.1 Terra: 6 Wins
Context Leader

GPT-6.1 Terra

1,050,000 tokens
Agentic Tool-Calling

Tie

Equal Capability
Lowest Latency (TTFT)

Tie

Equal Speed
Input Price Leader

GLM 5.3 FlashX Legal

$0.37 / MTok
Zhipu AIactive

GLM 5.3 FlashX Legal

GLM-5.3-FlashX-Legal (GLM-Legal) is Z.ai's legal-domain variant of GLM-5.3-FlashX, a native multimodal model that accepts text, image, and video input and produces text. It adds legal-domain mid-training and post-training with reinforcement...

View GLM 5.3 FlashX Legal Full Specs →
OpenAIactive

GPT-6.1 Terra

GPT-6.1 Terra is the mid-tier model in OpenAI's GPT-6.1 series, priced below GPT-6.1 Sol. It is suited for everyday agentic, coding, and writing work, is particularly strong at understanding screenshots...

View GPT-6.1 Terra Full Specs →

Technical Specifications

🏆 = Superior Spec
SpecificationGLM 5.3 FlashX LegalGPT-6.1 Terra
ProviderZhipu AIOpenAI
Context Window1,048,576 tokens1,050,000 tokens🏆
Agent SuitabilityNot yet benchmarkedNot yet benchmarked
Time to First Token (TTFT)No public TTFT dataNo public TTFT data
Deployment Modelmanaged apimanaged api
Production StabilityNot verifiedNot verified
API AvailableYesYes
Released Date2026-11-022026-10-26

API Pricing Comparison

Input Price per Million Tokens

GLM 5.3 FlashX Legal

$0.37

GPT-6.1 Terra

$1.00

Output Price per Million Tokens

GLM 5.3 FlashX Legal

$1.25

GPT-6.1 Terra

$5.00

💡 Cost Ratio: GLM 5.3 FlashX Legal is 2.7x cheaper per input token than GPT-6.1 Terra.

Want to test both models live?

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Benchmark Performance Metrics

Standardized Scores (0–100%)

Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.

MMLUGeneral knowledge & multi-task understanding
72.4%vs79.8%+7.4% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆
HumanEvalPython coding & logic synthesis
68.6%vs78.0%+9.4% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆
MATHComplex mathematical problem solving
41.8%vs55.2%+13.4% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆
GPQAGraduate-level expert reasoning
29.2%vs40.6%+11.4% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆
HellaSwagCommonsense reasoning and inference
76.4%vs82.8%+6.4% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆
MT-BenchMulti-turn conversation flow quality
7.9%vs8.5%+0.6% GPT-6.1 Terra
GLM 5.3 FlashX Legal
GPT-6.1 Terra 🏆

GLM 5.3 FlashX Legal Quirks & Gotchas

No developer gotchas reported.

GPT-6.1 Terra Quirks & Gotchas

No developer gotchas reported.

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