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  1. Models
  2. Text
  3. OpenAI

GPT Latest

Compatibility alias that routes to GPT 6 Astra, the newest GPT flagship for complex reasoning, coding, and agentic workflows.

  • Reasoning
  • Vision
  • Native PDF input
  • Tool Calling
  • Structured Output

Added Mar 29, 2026

Pricing

Auto routing · per 1M tokens
Input
$10.00
Output
$50.00
Cache read
$1.00
Compare provider prices

Specifications

Context window
1.1M
Max output
128K

Benchmarks

Sourced from Vectara.

Hallucination Rate

8.7%

Hallucination Rate: 8.7
Better than 59% of models compared

Factual Consistency

91.3%

Factual Consistency: 91.3
Better than 59% of models compared

Answer Rate

100.0%

Answer Rate: 100.0
Better than 91% of models compared

Avg Summary Length

Average generated summary length

148.5

Last updated 2026-10-22 · Matched as openai/gpt-6-astra

Vectara Leaderboard

Leaderboard results

These leaderboards tested GPT 6 Astra, another version of this model.

BenchmarkScoreRank on NanoGPT
Epoch AI Benchmarking Hub

Epoch AI data, CC BY 4.0 · Updated Nov 12, 2026

Epoch Capabilities Index

169.0

#3 of 115

FrontierMath v2 (Tiers 1–3)

93.7%

#2 of 83

GPQA Diamond

95.8%

#3 of 119

SimpleQA Verified

75.6%

#4 of 82

FrontierMath v2 (Tier 4)

97.6%

#3 of 67

OTIS Mock AIME 2024–2025

100.0%

#8 of 121

MirrorCode

60.0%

#12 of 39

Chess Puzzles

74.0%

#3 of 82

Mystery Game Puzzles

84.0%

#2 of 77

EQ-Bench

EQ-Bench data, MIT · Updated Nov 12, 2026

Creative Writing v3

2177

#1 of 96

Longform Writing

82.8

#6 of 97

UGI Leaderboard

UGI Leaderboard data, Apache-2.0 · Updated Oct 16, 2026

UGI Score

53.5

#26 of 149

UGI Willingness

3.2

#73 of 149

UGI Writing

68.9

#13 of 149

Filtered and ranked to models on NanoGPT.

Providers

Auto routing is available for this model. Explicit provider selection is not available.

Cache write /M
Auto
Auto
Recommended
$10.00$50.00$1.00$12.50N/AN/A
>272k$20.00$75.00$2.00$25.00
Batch API
ProviderInputOutputCached inputCache write
OpenAI
OpenAIgpt-latest
$5.00/M$25.00/M$0.50/M$6.25/M
>272k$10.00/M$37.50/M$1.00/M$12.50/M

Reliability

Related text models

Compare GPT Latest with similar models from the same provider or model family.

GPT 6.1 Terra Pro

openai/gpt-6.1-terra-pro

GPT-6.1 Terra Pro uses the same underlying model as GPT-6.1 Terra with Pro reasoning mode enabled for higher-quality responses on complex tasks.

GPT 6.1 Terra

openai/gpt-6.1-terra

GPT-6.1 Terra is a fast, efficient model for everyday work, with strong visual reasoning, clearer writing, and capable coding at half GPT-6.1 Sol’s standard token prices. It supports text and image input, tool calling, structured outputs, and optional reasoning from none through max.

GPT 6.1 Sol

openai/gpt-6.1-sol

GPT-6.1 Sol delivers near-Astra performance at a lower cost for complex coding, computer use, and professional work. It supports text and image input, tool calling, structured outputs, and reasoning from low through max.

GPT 6.1 Sol Pro

openai/gpt-6.1-sol-pro

GPT-6.1 Sol Pro uses the same underlying model as GPT-6.1 Sol with Pro reasoning mode enabled for higher-quality responses on complex tasks.

GPT 6 Luna

openai/gpt-6-luna

GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, suited for high-volume chat, classification, and lightweight agent workflows.

GPT 6 Luna Pro

openai/gpt-6-luna-pro

GPT-6 Luna Pro uses the same underlying model as GPT-6 Luna with Pro reasoning mode enabled for higher-quality responses on complex tasks.