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Tier B — Production
Runs in:USMade in:United States
OpenAI

gpt-5.6-luna

Tier B — Production · 1.05M tokens

Tokonomix Editorial Team·Reviewed by Mes Kalkan··
Section 01

Speed analysis

Latency measured across all benchmark runs. P50 (median) and P95 (95th percentile) give a realistic picture of response speed under normal and peak load.

P50 latency (median)P95 latency53 runs
48082111621502184309-3010-13ms
Section 02

Quality scores

How this model compares to the rest of the field on each prompt category, from a pairwise fit over the same prompts. The raw judge score sits underneath each number.

22%
Coding
judge mean 79
64%
Factual
judge mean 63
72%
Reasoning
judge mean 100

Win rate per category: how often this model beats a field-average model on a prompt from that category. 50% is average, not a failing grade. It is not a percentage of correct answers.

Section 03

Pricing

What you pay per million tokens when you use this model on Tokonomix, plus an estimate for a typical conversation.

💰
API rates — gpt-5.6-luna
$0.3900 per 1M input tokens
$2.34 per 1M output tokens
≈ $0.0007 per typical conversation (800 tokens)
Input vs output price (per 1M tokens)
per 1M input tokens$0.3900
per 1M output tokens$2.34
Section 04

Tokens per second

Throughput in tokens per second, derived from measured P50 latency. Higher is better; fluctuations track provider-side load.

Throughput (tokens / s)248 / avg 276
412115

Estimated from P50 latency × 200 output tokens — the absolute number depends on this assumption; the trend is what matters.

Section 05

Capabilities

toolssource: seed-newest-generation-2026-09-30visionjson modepdf inputreasoningjson schemaparallel toolsprompt cachingmax output tokens: 128000
Section 06

Availability

Availability

How often this model answers when we call it — measured across real API requests and live tests over the last 30 days. This is separate from quality: these numbers only tell you whether the model responds, not how good the answer is.

Last 7 days

—

Last 30 days

100.0%

n=1

Median response time

1,009ms

n=1

Based on 168 measurements over the last 30 days.

Technical details

Only live API calls and live-test requests count — internal probes and benchmark runs are excluded.

Calls with a custom API key (BYOK) are excluded: those failures are key-specific, not a sign of model downtime.

Failed calls are NOT included in quality scores — quality is measured on successful responses only. Availability and quality are independent signals.

Median response time (p50) across successful calls with a recorded duration. Outliers (very slow or very fast calls) pull the median less than the average.

Total calls (30d)

1

OK responses (30d)

1

Total calls (7d)

0

OK responses (7d)

0

Section 07

Tokonomix benchmark verdicts

⚖️
Endorsed by 1 judge
Independent LLM judges evaluated this model on our weekly intelligence tests
claude-sonnet-4-572/100 · 8 runs
5 correct1 partial2 wrong63% accuracy
● 2026-10-11

Significant capability expansion with tools and multimodal input support

This release represents a major functional evolution for gpt-5.6-luna, introducing seven new capabilities that substantially broaden the model's utility. The additions of tools, vision, and pdf_input transform this from a text-only model into a multimodal system capable of processing images and documents. The inclusion of reasoning capabilities suggests enhanced problem-solving potential, while json_mode, json_schema, and parallel_tools indicate improved structured output handling and efficiency for developer workflows. Prompt caching adds performance optimization for repeated queries. These changes position the model as a more versatile option for complex applications requiring multiple input types and structured interactions. However, without performance benchmark data for this window, it's unclear whether these capability additions come with trade-offs in speed, accuracy, or other metrics that users experienced in the previous baseline. The expansion from a focused text model to a feature-rich multimodal system represents a strategic shift that will appeal to users needing comprehensive AI tooling, though those seeking the simplicity of the previous text-focused approach may need to evaluate whether the added complexity aligns with their use cases.

Quality

—

Latency p50

—

Test runs

0

✓ Added multimodal vision support✓ Tool calling now available✓ Enhanced reasoning capabilities✓ PDF input processing enabled
Last automated test
Oct 13, 2026 · 08:04 UTC · Speed benchmark
P50 latency
805 ms
P95 latency
986 ms
Errors
0 / 6 runs
Last reviewed by Tokonomix Team·October 13, 2026