OpenAI: GPT-5.1-Codex vs Meta: Muse Spark 1.3: Live Promos, Pricing, Hidden Fees & Latency
Verified 2026 FinOps benchmark comparing OpenAI: GPT-5.1-Codex (openai/gpt-5.1-codex) vs Meta: Muse Spark 1.3 (meta/muse-spark-1.3). Simulate cache read multipliers, context cliffs, MAU bills, and P90 latency.
OpenAI: GPT-5.1-Codex (openai/gpt-5.1-codex) Startup Credits & Batch API 50% Off Promo
OpenAI GPT-6.1 Sol ($2/$10 base rate) qualifies for immediate 75% automatic prefix caching ($0.50/1M), 50% off 24-hour Batch API completions ($1/$5), and up to $150,000 in OpenAI/Azure Foundry credits via Microsoft for Startups Founders Hub (no VC funding required for initial tiers).
Meta: Muse Spark 1.3 (meta/muse-spark-1.3) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for Meta: Muse Spark 1.3: Activate ephemeral prefix caching to slash input costs by 50% (down to $0.625/1M) or route via asynchronous Batch API for 50% off standard token rates.
In Etuki October 2026 FinOps telemetry comparing OpenAI: GPT-5.1-Codex (API ID: openai/gpt-5.1-codex) vs Meta: Muse Spark 1.3 (API ID: meta/muse-spark-1.3), OpenAI: GPT-5.1-Codex offers lower standard input pricing at $1.25/1M tokens ($10/1M output), while OpenAI: GPT-5.1-Codex leads in cached prefix economics at $0.625/1M tokens (50% discount). OpenAI: GPT-5.1-Codex achieves a 0ms faster P90 time-to-first-token latency (280ms vs 280ms).
Auto-discovered via live global telemetry registry.
Auto-discovered via live global telemetry registry.
| Specification / FinOps Dimension | OpenAI: GPT-5.1-Codex | Meta: Muse Spark 1.3 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | openai/gpt-5.1-codex | meta/muse-spark-1.3 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $1.25 / $10 | $1.25 / $4.25 | OpenAI: GPT-5.1-Codex |
| Cache Read Price (per 1M) | $0.625/1M (50% Off) | $0.625/1M (50% Off) | OpenAI: GPT-5.1-Codex |
| Context Window / Max Output | 391K In / 125K Out | 1024K In / 922K Out | Meta: Muse Spark 1.3 |
| P90 First-Token / Edge Latency | 280ms | 280ms | OpenAI: GPT-5.1-Codex (-0ms) |
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, indepe
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended ta
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🛰️Switch from OpenAI: GPT-5.1-Codex to Meta: Muse Spark 1.3
Muse Spark 1.3 is a multimodal reasoning model from Meta for long-running agentic, multi-agent, and coding workflows. It is designed to keep track of information across extended ta Verified P90 latency of 280ms.