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GPT-5.3 Parameter Count and Token Quanity It Was Trained Leaked

BACKGROUND
1 SIGNALFIRST DETECTED 25 April 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
Other feeds and industry voices
29 Apr
Parameter Estimate

<table> <tr><td> <a href="https://www.reddit.com/r/OpenAI/comments/1sz8f5v/parameter_estimate/"> <img alt="Parameter Estimate"

OPINION · WHAT · OpenAIOPEN STORY
11 May
GPT5.5s CoT keeps leaking in the new codex update. Looks like we know how they got token efficency, they cavemanmaxxed

<table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1t9p40s/gpt55s_cot_keeps_leaking_in_the_new_codex_update/"> <img alt="GPT5.5s CoT keeps leaking in the new

OPINION · HOW · singularityOPEN STORY
19 May
Cerebras is running a trillion parameter model (Kimi K2.6) at 1000 tokens/s

<table> <tr><td> <a href="https://www.reddit.com/r/singularity/comments/1thw41i/cerebras_is_running_a_trillion_parameter_model/"> <img alt="Cerebras is running a trillion

OPINION · WHAT · singularityOPEN STORY
13 May
OpenAI accidentally leaked GPT-5.6 pricing

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1tcg7to/openai_accidentally_leaked_gpt56_pricing/"> <img alt="OpenAI accidentally leaked GPT-5.6 pricing"

OPINION · WHAT · ChatGPTOPEN STORY
7 Sept
What's your lifetime usage?

<table> <tr><td> <a href="https://www.reddit.com/r/ChatGPT/comments/1w9hvh1/whats_your_lifetime_usage/"> <img alt="What's your lifetime usage?"

OPINION · WHAT · ChatGPTOPEN STORY
Sources
ChatGPT

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