PickAIModel.com - Compare GPT-5.6 Luna and Grok 4.5
GPT-5.6 Luna vs Grok 4.5: pricing, Quality, Value, and benchmarks
Side-by-side buyer comparison built from the current published top 10 snapshot. Quality and Value stay deterministic, while editorial verdict excerpts remain clearly AI-labeled.
Provisional evidenceProvisional evidence
GPT-5.6 Luna Quality
45.0
Grok 4.5 Quality
49.3
Quality delta
-4.3Grok 4.5 leads
Value delta
-13.5Grok 4.5 leads
Buyer summary
Grok 4.5 leads Quality by 4.3 points. Grok 4.5 leads Value by 13.5 points.
Shared roster
Both pages link back to the same published roster and methodology, so the comparison stays on one deterministic evidence set.
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
Monthly price
Grok: Price unavailable
App access
Grok
Conversation benchmark
Unavailable
Verified vendor fact
Consumer plan pricing was not available in the current snapshot.
Verified vendor fact
Hosted app availability is grounded in the current official vendor surface.
Deterministic scores
Quality and Value comparison
GPT-5.6 Luna
Q 45.0
V 1.1
Quality rank 8 and value rank 9 in the current published roster.
Grok 4.5
Q 49.3
V 14.6
Quality rank 7 and value rank 8 in the current published roster.
Buyer access
Pricing, app access, and Conversation Value
GPT-5.6 Luna
Verified vendor fact3K tokens/chat
ChatGPT: Price unavailable
Unavailable
Hosted app: ChatGPT
Grok 4.5
Verified vendor fact3K tokens/chat
Grok: Price unavailable
Unavailable
Hosted app: Grok
Benchmark evidence
GPT-5.6 Luna
Verified evidence
Humanity's Last Exam
Normalized quality input
37.2%
Artificial Analysis GPT-5.6 Luna max analysis page | Independent Artificial Analysis HLE result for the max-reasoning model variant. Treat as tier-3 provisional evidence and do not describe it as OpenAI-published no-tools HLE.
AA-Omniscience
AA-Omniscience Index
-11.2
Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for GPT-5.6 Luna (max). Display-only; this row does not affect Quality or Value scores.
SWE-Bench Pro
Normalized quality input
62.7%
OpenAI GPT-5.6 release | OpenAI official GPT-5.6 launch table. Results are vendor-reported and must retain the named model tier, reasoning setting, benchmark version, and harness caveats.
GPQA Diamond
Normalized quality input
92.3%
OpenAI GPT-5.6 release | OpenAI official GPT-5.6 launch table. Results are vendor-reported and must retain the named model tier, reasoning setting, benchmark version, and harness caveats.
Benchmark evidence
Grok 4.5
Verified evidence
Humanity's Last Exam
Normalized quality input
40.3%
Artificial Analysis Grok 4.5 high evaluation | Independent exact Grok 4.5 high result; do not substitute another Grok reasoning configuration.
AA-Omniscience
AA-Omniscience Index
26.0
Artificial Analysis AA-Omniscience evaluation | Independent Artificial Analysis result for Grok 4.5 (high). Display-only; this row does not affect Quality or Value scores.
SWE-Bench Pro
Normalized quality input
64.7%
xAI Grok 4.5 release | Vendor-reported exact Grok 4.5 SWE-Bench Pro resolve rate; retain the published harness context.
Terminal-Bench 2.1
Multi-file coding
83.3%
xAI Grok 4.5 release | Vendor-reported exact Grok 4.5 Terminal-Bench 2.1 result; tool use is intrinsic to the harness.
Editorial excerpt
GPT-5.6 Luna
AI-assisted, editorially reviewed
The fastest, lowest-cost GPT-5.6 option for high-volume workloads.
GPT-5.6 Luna is the fastest and lowest-cost tier in the family. Its accepted HLE and SWE-Bench Pro evidence keep it competitive for high-volume workflows, while difficult tasks should still be tested against Terra or Sol.
Editorial excerpt
Grok 4.5
AI-assisted, editorially reviewed
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
This model is still under editorial review. We will publish a verdict as soon as we have completed our review of the AI model.
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