O
OpenAI
GPT-5.5
- Model type
- Proprietary
- Evidence state
- Estimated evidence
- Published context
- 1,000,000
GPT-5.5 vs
GPT-5.6 Luna
Read the published evidence, route context, and missing facts before making a local decision. This page does not name a universal winner.
Models in this comparison
Provider identity and evidence state stay balanced across the pair.
O
OpenAI
GPT-5.6 Luna
- Model type
- Proprietary
- Evidence state
- Estimated evidence
- Published context
- 1,050,000
Key implications
Insufficient shared-metric coverage. Each finding is tied to a published metric, price, context, or modality fact.
- Input API price: GPT-5.6 Luna has the lower verified rate ($1 / 1M tokens vs $5 / 1M tokens).
- Output API price: GPT-5.6 Luna has the lower verified rate ($6 / 1M tokens vs $30 / 1M tokens).
- Context window: GPT-5.6 Luna has the larger published context window (1,050,000 tokens vs 1,000,000 tokens).
Shared metric view
A radar is shown only when at least four compatible supported score metrics are published.
Comparable metric detail
- AgenticGPT-5.5: 64.71 · GPT-5.6 Luna: 52.82
- CodingGPT-5.5: 72.5 · GPT-5.6 Luna: 73.59
- KnowledgeGPT-5.5: 77.7 · GPT-5.6 Luna: 83.6
- MathGPT-5.5: 71.1 · GPT-5.6 Luna: 97
- MultimodalGroundedGPT-5.5: 65.3 · GPT-5.6 Luna: 60.2
- ReasoningGPT-5.5: 79 · GPT-5.6 Luna: 57.9
- OverallGPT-5.5: 72.92 · GPT-5.6 Luna: 67.35
Source metrics
Friendly metric names and published units stay visible. Missing measurements remain unavailable rather than becoming a score.
| Metric | Unit | GPT-5.5 | GPT-5.6 Luna |
|---|---|---|---|
| Agentic | score | 64.71 | 52.82 |
| Coding | score | 72.5 | 73.59 |
| Knowledge | score | 77.7 | 83.6 |
| Math | score | 71.1 | 97 |
| MultimodalGrounded | score | 65.3 | 60.2 |
| Reasoning | score | 79 | 57.9 |
| Overall | score | 72.92 | 67.35 |
Agentic
- Unit
- score
- GPT-5.5
- 64.71
- GPT-5.6 Luna
- 52.82
Coding
- Unit
- score
- GPT-5.5
- 72.5
- GPT-5.6 Luna
- 73.59
Knowledge
- Unit
- score
- GPT-5.5
- 77.7
- GPT-5.6 Luna
- 83.6
Math
- Unit
- score
- GPT-5.5
- 71.1
- GPT-5.6 Luna
- 97
MultimodalGrounded
- Unit
- score
- GPT-5.5
- 65.3
- GPT-5.6 Luna
- 60.2
Reasoning
- Unit
- score
- GPT-5.5
- 79
- GPT-5.6 Luna
- 57.9
Overall
- Unit
- score
- GPT-5.5
- 72.92
- GPT-5.6 Luna
- 67.35
Pricing and context
Verification is shown beside each selected route. Missing facts remain Not verified.
| Field | Unit | GPT-5.5 | GPT-5.6 Luna |
|---|---|---|---|
| Input API price | USD / 1M tokens | $5 | $1 |
| Cached input API price | USD / 1M tokens | $0.5 | $0.1 |
| Output API price | USD / 1M tokens | $30 | $6 |
| Route context | tokens | 1,000,000 | 1,050,000 |
| Input modalities | published list | Not verified | Not verified |
| Output modalities | published list | Not verified | Not verified |
Input API price
- Unit
- USD / 1M tokens
- GPT-5.5
- $5
- GPT-5.6 Luna
- $1
Cached input API price
- Unit
- USD / 1M tokens
- GPT-5.5
- $0.5
- GPT-5.6 Luna
- $0.1
Output API price
- Unit
- USD / 1M tokens
- GPT-5.5
- $30
- GPT-5.6 Luna
- $6
Route context
- Unit
- tokens
- GPT-5.5
- 1,000,000
- GPT-5.6 Luna
- 1,050,000
Input modalities
- Unit
- published list
- GPT-5.5
- Not verified
- GPT-5.6 Luna
- Not verified
Output modalities
- Unit
- published list
- GPT-5.5
- Not verified
- GPT-5.6 Luna
- Not verified
Evidence provenance
Source records, route identity, timestamps, and methodology are consolidated here without declaring either model a winner.
- Publication time
- Aug 30, 2026, 2:15 AM UTC
- Freshness
- Stale — Published weekly benchmark evidence has not refreshed within 8 days.
- Methodology
- benchlm: benchlm_raw_composite
- Model records
- GPT-5.5 — source benchlm · artifact models · model gpt-5-5
- GPT-5.6 Luna — source benchlm · artifact models · model gpt-5-6-luna
- Selected price routes
- GPT-5.5 — route benchlm:gpt-5-5 · source benchlm · provider openai
- GPT-5.6 Luna — route benchlm:gpt-5-6-luna · source benchlm · provider openai
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