diff --git a/src/cli.py b/src/cli.py
index c0edc7bb0..72e50244b 100644
--- a/src/cli.py
+++ b/src/cli.py
@@ -470,7 +470,7 @@ def _build_parser() -> argparse.ArgumentParser:
         '--provider',
         type=str,
         default=None,
-        help='Override the provider (anthropic, openai, zai, minimax, openrouter, deepseek)',
+        help='Override the provider (anthropic, openai, zai, minimax, openrouter, deepseek, meta)',
     )
     noninteractive.add_argument(
         '--allowed-tools',
diff --git a/src/models/configs.py b/src/models/configs.py
index ffe33b984..04e67352f 100644
--- a/src/models/configs.py
+++ b/src/models/configs.py
@@ -187,6 +187,36 @@ class ModelConfig:
         max_output_tokens=8_192,
         supports_cache=True,
     ),
+    # Meta Muse Spark 1.1 (api.meta.ai, OpenAI-compatible). Muse Spark is a
+    # server-side reasoning model (usage reports ``reasoning_tokens``); like
+    # DeepSeek/GLM it exposes no Anthropic-style thinking blocks (the
+    # ``thinking=`` kwarg is gated on ``is_anthropic`` in query.py), so the
+    # capability flags keep their defaults. Pricing lives in
+    # ``services/pricing.py`` (single source) — the cost_* fields are unset.
+    # A future ``muse-spark-2.x`` would prefix-match this row via
+    # ``get_model_config`` (base ``muse-spark``); register such variants
+    # explicitly, as the DeepSeek/GLM rows above note.
+    #
+    # context_window=1_048_576 (2^20): Meta's documented window — the
+    # api.meta.ai overview page states 1,048,576 tokens. Same 1M-class tier as
+    # the DeepSeek-V4 / GLM-5.2 rows above.
+    #
+    # max_output_tokens=16_384 is NOT sent as the wire ``max_tokens``:
+    # query.py forwards ``resolve_max_output_tokens()`` only for
+    # Anthropic/Minimax providers; OpenAI-compatible providers send no cap and
+    # rely on the server default (verified — a ~2.3K-token answer returns
+    # ``finish_reason="stop"``, not truncated). The value's only live effect is
+    # the auto-compact output reservation (``token_warning`` -> ``autocompact``,
+    # clamped at 20_000); 16_384 reserves more output headroom than DeepSeek/
+    # GLM's 8_192, which suits a model that spends part of its budget on
+    # reasoning tokens.
+    "muse-spark-1.1": ModelConfig(
+        model_id="muse-spark-1.1",
+        display_name="Muse Spark 1.1",
+        context_window=1_048_576,
+        max_output_tokens=16_384,
+        supports_cache=True,
+    ),
 }
 
 
diff --git a/src/providers/openai_compatible_specs.py b/src/providers/openai_compatible_specs.py
index c66b867b4..d96ad5b66 100644
--- a/src/providers/openai_compatible_specs.py
+++ b/src/providers/openai_compatible_specs.py
@@ -311,6 +311,19 @@ def resolved_class_name(self) -> str:
         env_vars=("DEEPINFRA_API_KEY", "DEEPINFRA_TOKEN"),
         aliases=("deep-infra", "deep_infra"),
     ),
+    # Meta's first-party API (api.meta.ai) — not a DeepSeek gateway; it serves
+    # its own ``muse-spark-1.1`` reasoning model over the OpenAI-compatible
+    # ``/v1/chat/completions`` endpoint (Bearer auth). ``muse``/``muse-spark``
+    # aliases mirror how ``kimi`` aliases ``moonshot``.
+    ProviderSpec(
+        id="meta",
+        label="Meta",
+        default_base_url="https://api.meta.ai/v1",
+        default_model="muse-spark-1.1",
+        available_models=("muse-spark-1.1",),
+        env_vars=("META_API_KEY", "META_AI_API_KEY"),
+        aliases=("meta-ai", "meta_ai", "muse", "muse-spark"),
+    ),
 )
 
 
diff --git a/src/services/pricing.py b/src/services/pricing.py
index 06deedeb9..90c1187a5 100644
--- a/src/services/pricing.py
+++ b/src/services/pricing.py
@@ -78,6 +78,24 @@
     "cache_creation": 0.435 / 1_000_000,
     "cache_read": 0.003625 / 1_000_000,
 }
+# Meta Muse Spark 1.1 (api.meta.ai, OpenAI-compatible). Meta's published rates:
+# $1.25/M input, $4.25/M output, $0.15/M cached input. OpenAI-style caching has
+# no separate cache-write charge, so ``cache_creation`` mirrors ``input``.
+# NOTE: the generic OpenAI-compat usage builder does not (yet) map
+# ``prompt_tokens_details.cached_tokens`` onto ``cache_read_input_tokens`` —
+# only the hand-written DeepSeek provider does — so today ``cache_read`` is
+# inert for Meta: cached input is billed at the full input rate in the cost
+# display, an over-estimate on the cached portion ($1.25 vs $0.15/M, ~8x).
+# The displayed cost is thus a safe upper bound, consistent with the other
+# registry providers; wiring the mapping into ``_build_usage_dict`` is a
+# separate change (it would affect all OpenAI-compat providers). The real
+# cache-read rate is recorded here for when that lands.
+_TIER_MUSE_SPARK = {
+    "input": 1.25 / 1_000_000,
+    "output": 4.25 / 1_000_000,
+    "cache_creation": 1.25 / 1_000_000,
+    "cache_read": 0.15 / 1_000_000,
+}
 
 
 # Exact-match table — keyed by canonical model name. Order DOESN'T matter
@@ -106,6 +124,8 @@
     # every proxied model is priced at its upstream rate.
     "deepseek-v4-flash": _TIER_DEEPSEEK_FLASH,
     "deepseek-v4-pro": _TIER_DEEPSEEK_PRO,
+    # Meta Muse Spark (api.meta.ai)
+    "muse-spark-1.1": _TIER_MUSE_SPARK,
 }
 
 
diff --git a/tests/test_provider_registry.py b/tests/test_provider_registry.py
index 8b9b5e2ae..4dcf421f4 100644
--- a/tests/test_provider_registry.py
+++ b/tests/test_provider_registry.py
@@ -26,7 +26,7 @@
     build_provider_class,
 )
 
-# The 18 OpenAI-compatible providers added via the registry.
+# The 19 OpenAI-compatible providers added via the registry.
 EXPECTED_NEW_PROVIDERS = {
     "nvidia-nim",
     "atlascloud",
@@ -46,6 +46,7 @@
     "together",
     "stepfun",
     "deepinfra",
+    "meta",
 }
 
 # A sample of (id -> (base_url, default_model)) — each vendor's published
@@ -58,6 +59,7 @@
     "deepinfra": ("https://api.deepinfra.com/v1/openai", "deepseek-ai/DeepSeek-V4-Pro"),
     "stepfun": ("https://api.stepfun.ai/v1", "step-3.7-flash"),
     "siliconflow-cn": ("https://api.siliconflow.cn/v1", "deepseek-ai/DeepSeek-V4-Pro"),
+    "meta": ("https://api.meta.ai/v1", "muse-spark-1.1"),
 }