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GPT 5.6 Luna
by OpenAI
CLOSEDHOSTEDFREE TO TRYCODING HELPFAST RESPONSESWRITING HELP
RANKED #21 OF 316 ASSISTANTS · OVERALL #26 OF 493 RANKED · VIBE SCORE 6.8 · 6,828 VOICES ·
COPY BADGE pastes a README snippet with the rank SVG.
A fast, versatile assistant by OpenAI built to help with coding, writing, and long chats.
HAPPY9.0
748 mentions
SAD6.0
530 mentions
VIBE TRAJECTORY
26 weeks · 6,922 voices in this window
QUIETLY DEGRADING
Recent vibe and chatter are both sliding.
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 5.6 Luna 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 27BAlibabaRun strong multimodal reasoning and coding locally without vendor lock in.🔒 PRIVATE & OFFLINE💻 STRONG AT CODE❤️ CROWD FAVORITE21.2k VOICESMATCH★★★ - OPEN WEIGHTS7.3Dots3 NoteXiaohongshuOffers full omni multimodal reasoning and massive context at low active compute.💸 COST EFFICIENT🏆 NEAR-PEER QUALITY💻 STRONG AT CODE2.9k VOICESMATCH★★★
- OPEN WEIGHTS7.2
DeepSeek V4 Flash Vision ExpDeepSeekProvides snappy visual debugging and code assistance with minimal inference overhead.💸 COST EFFICIENT⚡ FAST💻 STRONG AT CODE5.5k VOICESMATCH★★★
WHAT THE INTERNET SAYS
Users love GPT 5.6 Luna for its great value, quick answers, and strong coding help. However, some complain about occasional errors, service limits, and overly preachy refusals.
6274 POSTS · 554 COMMENTS · REDDIT · BLUESKY · HACKER NEWS · X · GITHUB · DEV.TO · DEV FORUMS · LEMMY · BLOG
PEOPLE LOVE
- People feel it is worth the money (48 mentions)
- Popular for coding help (31 mentions)
- Answers come back fast (18 mentions)
- Good at writing and wording things (6 mentions)
PEOPLE COMPLAIN ABOUT
- Refuses or lectures more than people like (23 mentions)
- Outages, errors, or limits get in the way (21 mentions)
- Sometimes makes things up (16 mentions)
TOPIC BY TOPIC
- PriceMOSTLY POSITIVE
48 thumbs up · 28 thumbs down
- Help with codeMOSTLY POSITIVE
31 thumbs up · 24 thumbs down
- Working when you need itA SORE SPOT
11 thumbs up · 21 thumbs down
- Getting facts rightMIXED FEELINGS
12 thumbs up · 16 thumbs down
- Saying no too muchA SORE SPOT
2 thumbs up · 23 thumbs down
- SpeedPEOPLE LOVE THIS
18 thumbs up · 1 thumbs down
- WritingPEOPLE LOVE THIS
6 thumbs up · 2 thumbs down
- Long conversationsPEOPLE LOVE THIS
5 thumbs up · 1 thumbs down
IN THEIR OWN WORDS
- FROM REDDIT >
“GPT 5.6 Luna is now Better than Google's Best Model and Cheaper than Google's Cheapest Model.”
- FROM X >
“I CANCELED CURSOR AND CLAUDE CODE THIS MONTH → freebuff does the same thing → gpt 5.6 luna and deepseek v4 flash for fre.”
- FROM X >
“codex basically gives you infinite gpt 5.6 luna max usage on the $20 chatgpt plus plan absolutely insane value imo claud.”
LOOKING FOR AN ALTERNATIVE?
Checked picks first: tags say why you would switch, stars say how fully each one stands in for GPT 5.6 Luna.
Grok 4.6
Gemini 3.7 Flash> SOURCES (12)
- REDDIT · 2026-08-17 · 1127 UPVOTESArtificial Analysis' Qwen3.8-27B benchmarks put it neck and neck with DeepSeek V4 and GPT-5.6 Luna Max
Artificial Analysis' Qwen3.8-27B benchmarks put it neck and neck with DeepSeek V4 and GPT-5.6 Luna Max
- REDDIT · 2026-07-05 · 877 UPVOTESGpt 5.6 discovered new math according to Sam Altman
Gpt 5.6 discovered new math according to Sam Altman
- REDDIT · 2026-07-31 · 784 UPVOTESNew DeepSeek V4-Flash achieves 50 on ArtificalAnalysis Index, 1 point below GLM-5.2 and GPT-5.6 Luna
New DeepSeek V4-Flash achieves 50 on ArtificalAnalysis Index, 1 point below GLM-5.2 and GPT-5.6 Luna
- X · 2026-08-16 · 718 UPVOTES🚨 THE AI BOOM HAS A MASSIVE PROBLEM NOBODY IS PRICING IN OpenAI just cut GPT-5.6 Luna by 80%, from $1 to $0.20 per mill
🚨 THE AI BOOM HAS A MASSIVE PROBLEM NOBODY IS PRICING IN OpenAI just cut GPT-5.6 Luna by 80%, from $1 to $0.20 per mill
- REDDIT · 2026-07-30 · 649 UPVOTESGPT‑5.6 Luna will cost 80% less, while GPT‑5.6 Terra will cost 20% less.
GPT‑5.6 Luna will cost 80% less, while GPT‑5.6 Terra will cost 20% less.
- REDDIT · 2026-07-30 · 622 UPVOTESOpenAI just cut GPT-5.6 Luna API pricing by 80% — the price/performance is insane
OpenAI just cut GPT-5.6 Luna API pricing by 80% — the price/performance is insane
- REDDIT · 2026-07-30 · 592 UPVOTESOpenAI just cut prices by up to 80% and Anthropic is crickets
OpenAI just cut prices by up to 80% and Anthropic is crickets
- X · 2026-08-16 · 561 UPVOTESGPT-5.6 Luna Max scores 13.3 points above Sonnet 5 Max on DeepSWE v1.1 while Sonnet costs 44x as much. DeepSWE tests cod
GPT-5.6 Luna Max scores 13.3 points above Sonnet 5 Max on DeepSWE v1.1 while Sonnet costs 44x as much. DeepSWE tests cod
- REDDIT · 2026-07-30 · 530 UPVOTESOpenAI beats DeepSeek on price/performance after 80% Luna price cut
OpenAI beats DeepSeek on price/performance after 80% Luna price cut
- REDDIT · 2026-09-16 · 527 UPVOTESGPT 5.6 Luna has Ultra effort now
GPT 5.6 Luna has Ultra effort now
- REDDIT · 2026-08-17 · 517 UPVOTESQwen3.8-27B lands next to DeepSeek V4 and GPT-5.6 Luna Max on the Artificial Analysis Benchmark. You can now run a near frontier model with…
Qwen3.8-27B lands next to DeepSeek V4 and GPT-5.6 Luna Max on the Artificial Analysis Benchmark. You can now run a near frontier model with just a RTX 3090.
- REDDIT · 2026-06-26 · 500 UPVOTESGpt 5.6 better than Mythos 5 that's really good
Gpt 5.6 better than Mythos 5 that's really good