LOADING DATASHEET
GROUNDED IN REAL HUMAN CONVERSATIONSYOUR BENCH
GPT 5.5 Pro
by OpenAI
CLOSEDHOSTEDAPILONG CONTEXTPAIDREASONING
RANKED #255 OF 258 ASSISTANTS · OVERALL #397 OF 6,551 · VIBE SCORE 4.6 · 252 VOICES
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
HAPPY5.8
10 mentions
SAD9.2
10 mentions
VIBE TRAJECTORY
26 weeks · 142 voices
HOLDING UP
Recent vibe is steady. No clear fade in the crowd.
HOW TO USE IT
Closed model. OpenAI hosts it, so you use it through an app or an API.
PREFER OPEN SOURCE? THE CROWD HAS PICKS
GPT 5.5 Pro is closed, so you rent it. These open-weight models can genuinely stand in for it. Download once, own forever.
- OPEN WEIGHTS7.6
Qwen3.8 27BAlibabaRuns locally on consumer GPUs with strong multimodal vision and coding skills.💻 STRONG AT CODE🏆 NEAR-PEER QUALITY🔒 PRIVATE & OFFLINE12.2k VOICESMATCH★★★ - OPEN WEIGHTS6.7
Mistral SmallMistralFast and lightweight open multimodal model that handles daily tasks locally.🪶 RUNS ON LESS⚡ FAST🔒 PRIVATE & OFFLINE1.0k VOICESMATCH★★★
WHAT THE INTERNET SAYS
People generally like GPT 5.5 Pro, with some gripes. Biggest praise: writing. Biggest gripe: price.
211 POSTS · 41 COMMENTS · REDDIT · GITHUB · LEMMY · HACKER NEWS · BLOG · X
PEOPLE LOVE
- Good at writing and wording things (11 mentions)
- Popular for coding help (7 mentions)
- Answers come back fast (2 mentions)
PEOPLE COMPLAIN ABOUT
- Sometimes makes things up (6 mentions)
- People find it expensive (6 mentions)
- Outages, errors, or limits get in the way (4 mentions)
TOPIC BY TOPIC
- WritingPEOPLE LOVE THIS
11 thumbs up · 1 thumbs down
- Getting facts rightMIXED FEELINGS
4 thumbs up · 6 thumbs down
- Help with codePEOPLE LOVE THIS
7 thumbs up · 2 thumbs down
- PriceA SORE SPOT
2 thumbs up · 6 thumbs down
- Working when you need itA SORE SPOT
2 thumbs up · 4 thumbs down
- SpeedMOSTLY POSITIVE
2 thumbs up · 1 thumbs down
LOOKING FOR AN ALTERNATIVE?
Checked picks first: tags say why you would switch, stars say how fully each one stands in for GPT 5.5 Pro.
Grok 4.6
Gemini 3.7 Flash> SOURCES (12)
- REDDIT · 2026-07-26 · 1110 UPVOTESDifferences Between Fable 5 and Opus 5 on MineBench.ai
Differences Between Fable 5 and Opus 5 on MineBench.ai
- REDDIT · 2026-04-14 · 887 UPVOTESAnthropic is set to release Claude Opus 4.7 and a new AI design tool as early as this week
Anthropic is set to release Claude Opus 4.7 and a new AI design tool as early as this week
- REDDIT · 2026-06-11 · 616 UPVOTESDifferences Between Claude Opus 4.8 and Claude Fable 5 on MineBench
Differences Between Claude Opus 4.8 and Claude Fable 5 on MineBench
- REDDIT · 2024-05-23 · 561 UPVOTESIt's becoming increasingly clear that OpenAI employees leaving are not just 'decel' fearmongers. Why OpenAI can't be trusted (with sources)
It's becoming increasingly clear that OpenAI employees leaving are not just 'decel' fearmongers. Why OpenAI can't be trusted (with sources)
- REDDIT · 2025-08-25 · 542 UPVOTESGPT-5 completes Pokémon Crystal - Defeats final boss in 9,517 steps compared to 27,040 for o3
GPT-5 completes Pokémon Crystal - Defeats final boss in 9,517 steps compared to 27,040 for o3
- REDDIT · 2025-10-11 · 491 UPVOTESGPT-5 & Gemini 2.5 Pro Secures Gold in International Olympiad of Astronomy and Astrophysics [IOAA]
GPT-5 & Gemini 2.5 Pro Secures Gold in International Olympiad of Astronomy and Astrophysics [IOAA]
- REDDIT · 2025-08-07 · 486 UPVOTESOpenAI did a poor job at communicating what their model does better, with GPT-5 able to complete much longer tasks
OpenAI did a poor job at communicating what their model does better, with GPT-5 able to complete much longer tasks
- REDDIT · 2025-01-17 · 433 UPVOTESSam comments on GPT-5
Sam comments on GPT-5
- REDDIT · 2026-04-27 · 406 UPVOTESDifferences Between GPT 5.4 and GPT 5.5 on MineBench
Differences Between GPT 5.4 and GPT 5.5 on MineBench
- REDDIT · 2025-11-06 · 398 UPVOTESKimi K2 Thinking, A Chinese Open-Source Trillion-Parameter Thinking model, surpass Grok 4 and GPT-5 on HLE
Kimi K2 Thinking, A Chinese Open-Source Trillion-Parameter Thinking model, surpass Grok 4 and GPT-5 on HLE
- HACKER NEWS · 2026-06-08 · 397 UPVOTESDeepSeek V4 Pro beats GPT-5.5 Pro on precision
DeepSeek V4 Pro beats GPT-5.5 Pro on precision
- REDDIT · 2025-12-01 · 350 UPVOTESGemini 3 is pulling the same dynamic downgrade scam that ruined the GPT-5 launch
Gemini 3 is pulling the same dynamic downgrade scam that ruined the GPT-5 launch