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Head-to-head comparison

Muse Glimmer 30B vs GPT-5.6 Terra

Muse Glimmer 30B (Meta) and GPT-5.6 Terra (OpenAI) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 9 September 2026

As of 9 September 2026, GPT-5.6 Terra holds the stronger ModelCap Index position (#15 vs #28); Muse Glimmer 30B is 10.9× cheaper per output token ($1.10/1M vs $12.00/1M); GPT-5.6 Terra offers the longer context window (1M vs 131K tokens); and Muse Glimmer 30B ships open weights.

Which should you choose?

Choose Muse Glimmer 30B if…

  • API cost matters — $1.10/1M output tokens against $12.00/1M, about 10.9× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.30/1M against $2.00/1M.
  • you want to self-host: Muse Glimmer 30B ships open weights while GPT-5.6 Terra is api only.
  • you want provider choice — 4 listed API providers against 3.
  • you want the more recently listed model — Muse Glimmer 30B was listed 9 August 2026, GPT-5.6 Terra 9 July 2026.

Choose GPT-5.6 Terra if…

  • you want the stronger overall ModelCap Index position — #15 against #28 (76.1 vs 68.4 points).
  • you need the longer context window — 1M tokens against 131K.

Muse Glimmer 30B vs GPT-5.6 Terra: specs, pricing and context

Specification comparison of Muse Glimmer 30B and GPT-5.6 Terra
FieldMuse Glimmer 30BMetaGPT-5.6 TerraOpenAI
ModelCap Index position#28#15
Index score68.476.1
EvidenceMeasuredMeasured
Input price / 1M tokens$0.30$2.00
Output price / 1M tokens$1.10$12.00
Context window131K tokens1M tokens
Max output tokens118K128K
API providers listed43
Weight accessOpen weightsAPI only
Input modalitiesText, ImageFile, Image, Text
First listed9 August 20269 July 2026
PublisherMetaOpenAI

Evidence: publisher-corpus-prior over 182 held-out anchors (37%); 1 specialist-board observation at 1.3% support (21%); launch card against 2 resolved peers on 12 rows (42%); exceeds every named peer on 6 of 12 rows; optimism haircut 0 from cross-lab-probe; shrunk 8.1 up toward the measured corpus · 6 public benchmark observations across 6 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Muse Glimmer 30B vs GPT-5.6 Terra

Public benchmark boards where Muse Glimmer 30B or GPT-5.6 Terra has a published result
BoardMuse Glimmer 30BGPT-5.6 TerraLeads
Arena codingArena (LMArena)—15191511–1527X-HighOnly one result
LMArena AgentLMArena—1.5%0.3%–2.7%X-HighOnly one result
ARC-AGI-2ARC Prize Foundation—83.9%MaxOnly one result
ARC-AGI-3ARC Prize Foundation—0.8%MaxOnly one result
AA Intelligence IndexArtificial Analysis—42.3intelligence-index:v4.3:maxOnly one result
AA Terminal-Bench 2.1Artificial Analysis—88.0%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="GPT-5.6 Terra (max)":reasoning=trueOnly one result
AA τ²-Bench TelecomArtificial Analysis—86.3%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="GPT-5.6 Terra (max)":reasoning=trueOnly one result
AA Humanity's Last ExamArtificial Analysis—42.9%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="GPT-5.6 Terra (max)":reasoning=trueOnly one result
Terminal-Bench 4.0Terminal-Bench (Laude Institute)—21.5%18.3%–24.8%Codex · MaxOnly one result
WildClawBench OpenClawWildClawBench47.6—Only one result

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Muse Glimmer 30B vs GPT-5.6 Terra: common questions

Is Muse Glimmer 30B better than GPT-5.6 Terra?

GPT-5.6 Terra ranks higher on the ModelCap Index as of 9 September 2026: #15 against #28. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Muse Glimmer 30B cheaper than GPT-5.6 Terra?

Muse Glimmer 30B is cheaper on output tokens: $1.10/1M against $12.00/1M. Input tokens are $0.30/1M for Muse Glimmer 30B and $2.00/1M for GPT-5.6 Terra. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens. For 1,000 requests with 2,000 input and 500 output tokens each (2M input + 0.5M output), the listed-rate estimate is $1.15 for Muse Glimmer 30B versus $10.00 for GPT-5.6 Terra. Muse Glimmer 30B costs 88.5% less in this scenario. This excludes caching, batch discounts, prompt-length tiers, tool charges and retries; verify the selected endpoint before budgeting.

Which has the bigger context window, Muse Glimmer 30B or GPT-5.6 Terra?

GPT-5.6 Terra has the larger context window: 1M tokens against 131K.

Which is better for coding, Muse Glimmer 30B or GPT-5.6 Terra?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Muse Glimmer 30B and GPT-5.6 Terra open-weight models?

Muse Glimmer 30B: Open weights. GPT-5.6 Terra: API only. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Muse Glimmer 30B and GPT-5.6 Terra?

ModelCap currently lists 4 API providers for Muse Glimmer 30B and 3 for GPT-5.6 Terra, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Muse Glimmer 30B vs GPT-5.6 Terra comparison?

Every figure comes from the sealed ModelCap dataset published 9 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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