GPT-3.5
GPT-3.5, OpenAI's foundational model, is now a legacy asset under siege. Developed by OpenAI and still used by Codex 5.3, it faces a crowded competitive arena: Claude 3.5 Opus, Gemini 3 Pro, and its own successor GPT-5.3 all target its use cases. More tellingly, the graph pits GPT-3.5 against Microsoft Excel and Artificial Analysis—suggesting it's being benchmarked not just against other LLMs but against deterministic tools. Recent headlines focus entirely on GPT-5.5, not GPT-3.5, signaling that OpenAI's innovation velocity has left this model behind. With only 15 total mentions and a flat 14-in-30-day mention count, GPT-3.5 is a commodity—stable but undifferentiated. Its sole lifeline is Codex 5.3, which still depends on it for code generation. Meanwhile, GPT-4o competes from within the family, accelerating cannibalization.
- ·Competes with six entities including Claude 3.5 Opus, GPT-5.3, and Microsoft Excel
- ·Only 5 mentions in last 7 days; news cycle dominated by GPT-5.5
- ·Codex 5.3 remains the sole downstream user of GPT-3.5
- ·GPT-4o competes internally, eroding GPT-3.5's relevance
Signal Radar
Five-axis snapshot of this entity's footprint
Mentions × Lab Attention
Weekly mentions (solid) and average article relevance (dotted)
Timeline
10- Research MilestoneMay 2, 2026
GPT-5.5 fully solved TLO enterprise network simulation in 2 of 10 attempts
View source- simulation:
- TLO
- success rate:
- 2/10
- Research MilestoneMay 2, 2026
GPT-5.5 scored 71.4% on AISI expert CTF tasks, matching Claude Mythos Preview
View source- score:
- 71.4%
- task type:
- expert CTF
- Product LaunchApr 24, 2026
Early user review of GPT-5.5 in Codex highlights major improvements
- Product LaunchApr 23, 2026
GPT-5.5 model family achieves leading position on Artificial Analysis Index for cost-performance
- Product LaunchApr 23, 2026
OpenAI engineer reveals GPT-5.5 is a Blackwell-native model trained on Nvidia GB200/GB300 NVL72 systems.
- Product LaunchApr 23, 2026
GPT-5.5 spotted via Codex API backdoor, suggesting unofficial release channel for image generation.
- Product LaunchApr 23, 2026
Ethan Mollick announces early access to GPT-5.5, praises the Pro version, full writeup forthcoming.
- Product LaunchApr 23, 2026
OpenAI announces GPT-5.5 as a new intelligence tier for agents and tool use
View source - Product LaunchApr 23, 2026
OpenAI released GPT-5.5, an agentic model topping Terminal-Bench 2.0, with two variants: standard and Pro
View source - Product LaunchApr 4, 2026
OpenAI launches GPT-5.5 with double the pricing of GPT-5.4 at $5/$30 per 1M tokens
View source- input price:
- $5/1M tokens
- output price:
- $30/1M tokens
Relationships
12Competes With
Developed
Regulated
Recent Articles
14GPT-5.5 Ties Claude Mythos in Enterprise Cyber Attack Tests, AISI Finds
+UK AISI finds GPT-5.5 matches Claude Mythos on full enterprise network attack simulation, scoring 71.4% on expert tasks vs 68.6%.
100 relevanceGPT-5.5 + Codex Combines App Building, Browser Use, Image Gen
+@intheworldofai claims GPT-5.5 + Codex is a super app better than Claude Code, with 7 capabilities including app building, debugging, browser use, and
100 relevanceGPT-5.5 Pro Leapfrogs on Epoch Benchmark; Base Model Beats Prior Pro
+A tweet from @kimmonismus reveals GPT-5.5 Pro shows significant Epoch benchmark gains, and the non-Pro GPT-5.5 surpasses GPT-5.4 Pro, suggesting major
99 relevanceGPT-5.5 Launches: The Super App Strategy, Not the Model
+OpenAI released GPT-5.5, codenamed Spud, 48 days after GPT-5.4. The model itself is less interesting than the super app strategy, 35x cost reduction o
100 relevanceAgent Harnessing: The Infrastructure That Makes AI Agents Work
+A detailed technical guide argues that the model is not the hard part of building AI agents. The six-component harness — context management, memory, t
88 relevanceGPT-5.5 Tops Benchmarks, Costs 2x API Price, Still Hallucinates
+OpenAI launched GPT-5.5, an agentic model that tops Terminal-Bench 2.0 at 82.7% and surpasses Claude Opus 4.7 and Gemini 3.1 Pro on coding and math. H
100 relevanceOpenAI Launches GPT-5.5: Smarter Agents, Deeper Tool Use
+OpenAI unveiled GPT-5.5, positioned as a new intelligence tier designed for real-world work and autonomous agents, with enhanced tool-use capabilities
97 relevanceGPT-5.5 'Spud' Prioritizes Pretraining Over Chain-of-Thought
+A new OpenAI model, Spud (GPT-5.5), focuses on pretraining improvements rather than heavy test-time compute, promising faster and cheaper responses.
85 relevanceOpenAI Teases GPT-5.5 Launch: What We Know
+A tweet from @intheworldofai suggests OpenAI will launch GPT-5.5 tomorrow, framing it as a pivotal moment akin to GPT-3.5. The announcement signals a
87 relevanceGPT-5.5 Demo Shows AI Generating Functional Excel-Like Spreadsheet
+A user demonstrated GPT-5.5 creating a web-based spreadsheet with formatting and grid behavior. This showcases incremental progress in AI's ability to
85 relevanceEthan Mollick: OpenAI's O1 Release Was Second Most Important LLM Launch
~Ethan Mollick tweeted that OpenAI's O1 launch was the second most important LLM release after GPT-3.5, featuring a pivotal chart. He expressed surpris
93 relevanceGPT-5.5 Stealth Test Reports Emerge, Claiming Performance Over Opus 4.7
+Social media reports suggest OpenAI may be conducting limited, unannounced testing of GPT-5.5. Initial, unverified claims from testers indicate it out
85 relevanceGPT-5.5 Limited Rollout Begins, Frontend Improvements Noted
+OpenAI has started a limited rollout of GPT-5.5 to select users, with early reports highlighting significant frontend quality improvements. This sugge
85 relevanceStudy: People Rely on AI for Medical Advice, But Quality Evidence Lags
-A new paper reveals people are frequently using AI for medical advice, but most research uses outdated models and lacks comparison to the non-AI infor
85 relevance
Predictions
No predictions linked to this entity.
AI Discoveries
1- observationactiveApr 19, 2026
Velocity spike: GPT-3.5
GPT-3.5 (ai_model) surged from 0 to 3 mentions in 3 days (new_surge).
80% confidence
Sentiment History
| Week | Avg Sentiment | Mentions |
|---|---|---|
| 2026-W14 | 0.60 | 1 |
| 2026-W16 | 0.10 | 3 |
| 2026-W17 | 0.41 | 7 |
| 2026-W18 | 0.60 | 4 |