Pick Gemini 2.5 Flash for cheapest 1m-context option or very fast. Pick Muse Spark 1.3 for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2 or deepswe v1.1 long-horizon software engineering (75.4). On a tight budget at scale, Gemini 2.5 Flash is the value pick.
Gemini 2.5 Flash (Google) and Muse Spark 1.3 (Meta) are two of the models people most often weigh against each other in 2026. Gemini 2.5 Flash is google's ultra-cheap, fast 1M-context model for high-volume multimodal work. Muse Spark 1.3 is meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review. Their biggest split is price, and the breakdown below shows exactly how that plays out for your workload.
Key differences
Price: Gemini 2.5 Flash is about 4.2× cheaper on input ($0.3/$2.5 per 1M tokens vs $1.25/$4.25 per 1M tokens) — meaningful once you are processing millions of tokens a month.
Context window: both advertise 1M (~1,500 pages). Tie on paper — test on your own long inputs, since usable recall varies by model.
Recency: Muse Spark 1.3 is the newer model by about 15 months (released September 2, 2026), usually meaning fresher training data and capabilities.
Specifications
Spec
Gemini 2.5 Flash
Muse Spark 1.3
Provider
Google (US)
Meta (US)
Released
June 2025
September 2, 2026
Context window
1M (~1,500 pages)
1M tokens (~1,500 pages)
Price (in/out)
$0.3/$2.5 per 1M tokens
$1.25/$4.25 per 1M tokens
Open weight?
No — API only
No — API only
Modalities
text, image, audio, video, code
text, image, video
SWE-Bench Verified
Not published
Not published
MRCR v2 @ 1M
Not published
98.1%
Who wins what
Cheapest 1M-context option: Gemini 2.5 Flash — At $0.3/$2.5 per 1M tokens it undercuts Muse Spark 1.3 ($1.25/$4.25 per 1M tokens), and that gap compounds at volume.
Very fast: Gemini 2.5 Flash — Google's ultra-cheap, fast 1M-context model for high-volume multimodal work — and it runs cheaper at $0.3/$2.5 per 1M tokens.
High-volume multimodal: Gemini 2.5 Flash — Gemini 2.5 Flash lists high-volume multimodal among its strengths; Muse Spark 1.3 does not.
Agentic coding with ~20% fewer tool calls and ~25% fewer tokens than Muse Spark 1.2: Muse Spark 1.3 — Meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review — and it is the newer of the two.
DeepSWE v1.1 long-horizon software engineering (75.4): Muse Spark 1.3 — Muse Spark 1.3 lists deepSWE v1.1 long-horizon software engineering (75.4) among its strengths; Gemini 2.5 Flash does not.
Near-perfect long-context retrieval (MRCR v2 512K-1M: 98.1): Muse Spark 1.3 — Muse Spark 1.3 lists near-perfect long-context retrieval (MRCR v2 512K-1M: 98.1) among its strengths; Gemini 2.5 Flash does not.
Lowest cost at scale: Gemini 2.5 Flash — At $0.3/$2.5 per 1M tokens, it is the cheaper of the two — the gap dominates the bill on high-volume workloads.
Which should you pick?
A cost-sensitive startup shipping high volume: Gemini 2.5 Flash — At $0.3/$2.5 per 1M tokens it undercuts Muse Spark 1.3, and on millions of tokens that margin decides the monthly bill.
Anyone whose priority is cheapest 1m-context option: Gemini 2.5 Flash — It is specifically built for that.
Anyone whose priority is agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2: Muse Spark 1.3 — That is its strongest area.
Gemini 2.5 Flash: where it fits
Google's ultra-cheap, fast 1M-context model for high-volume multimodal work. Released June 2025 by Google, it is built for cheapest 1M-context option, very fast, high-volume multimodal, and workspace integration.
Its trade-offs are real: lighter reasoning than Pro tiers, and superseded by 3.5 Flash. At $0.3 in / $2.5 out per million tokens, it sits in the budget price band.
Muse Spark 1.3: where it fits
Meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review. Released September 2, 2026 by Meta, it is built for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than Muse Spark 1.2, deepSWE v1.1 long-horizon software engineering (75.4), near-perfect long-context retrieval (MRCR v2 512K-1M: 98.1), and ranks third overall on the Artificial Analysis Intelligence Index (score 61, xhigh variant; the limited-preview max variant scores 62) - behind only Claude Fable 5.1 and Claude Opus 5.
Its trade-offs: strongest 'max' reasoning configuration still gated pending additional safety testing, not yet open-weight, despite Meta roadmapping a future Muse Spark weights release, and no official SWE-bench Verified score published. At $1.25 in / $4.25 out per million tokens, it sits in the mid price band.
The bottom line for this matchup
Gemini 2.5 Flash and Muse Spark 1.3 overlap enough that the right pick depends on your specific job. Gemini 2.5 Flash costs less per token; and each leads in its own area — Gemini 2.5 Flash for cheapest 1m-context option, Muse Spark 1.3 for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2. Rather than crowning one, run the same hard task through both once and let the results decide.
Frequently asked questions
Is Gemini 2.5 Flash or Muse Spark 1.3 better for coding?
Public SWE-Bench figures are not available for either model, so the honest test is your own repository — run an identical real bug through both. By design, Gemini 2.5 Flash leans toward cheapest 1m-context option while Muse Spark 1.3 leans toward agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2, and that positioning usually predicts which feels better on your codebase.
Which is cheaper, Gemini 2.5 Flash or Muse Spark 1.3?
Gemini 2.5 Flash is cheaper — $0.3/$2.5 per 1M tokens vs $1.25/$4.25 per 1M tokens, roughly 4.2× apart on input.
Which has the bigger context window?
Both advertise 1M (~1,500 pages). Remember advertised ≠ usable: recall typically degrades before the ceiling.
Can I use both Gemini 2.5 Flash and Muse Spark 1.3 together?
Yes — a multi-model platform like LumiChats gives you Gemini 2.5 Flash, Muse Spark 1.3 and 40+ others under one ₹69/day pass (about $1/day), so you can draft with one and cross-check with the other instead of buying two subscriptions.
Which is newer, Gemini 2.5 Flash or Muse Spark 1.3?
Muse Spark 1.3 — released September 2, 2026, about 15 months after Gemini 2.5 Flash.
Gemini 2.5 Flash vs Muse Spark 1.3
Google · US | Meta · US · Updated June 2026
Quick verdict
Pick Gemini 2.5 Flash for cheapest 1m-context option or very fast. Pick Muse Spark 1.3 for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2 or deepswe v1.1 long-horizon software engineering (75.4). On a tight budget at scale, Gemini 2.5 Flash is the value pick.
Gemini 2.5 Flash (Google) and Muse Spark 1.3 (Meta) are two of the models people most often weigh against each other in 2026. Gemini 2.5 Flash is google's ultra-cheap, fast 1M-context model for high-volume multimodal work. Muse Spark 1.3 is meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review. Their biggest split is price, and the breakdown below shows exactly how that plays out for your workload.
Key differences at a glance
▸Price: Gemini 2.5 Flash is about 4.2× cheaper on input ($0.3/$2.5 per 1M tokens vs $1.25/$4.25 per 1M tokens) — meaningful once you are processing millions of tokens a month.
▸Context window: both advertise 1M (~1,500 pages). Tie on paper — test on your own long inputs, since usable recall varies by model.
▸Recency: Muse Spark 1.3 is the newer model by about 15 months (released September 2, 2026), usually meaning fresher training data and capabilities.
Side-by-side specs
Spec
Gemini 2.5 Flash
Muse Spark 1.3
Provider
Google (US)
Meta (US)
Released
June 2025
September 2, 2026
Context window
1M (~1,500 pages)
1M tokens (~1,500 pages)
Price (in/out)
$0.3/$2.5 per 1M tokens
$1.25/$4.25 per 1M tokens
Open weight?
No — API only
No — API only
Modalities
text, image, audio, video, code
text, image, video
SWE-Bench Verified
Not published
Not published
MRCR v2 @ 1M
Not published
98.1%
Who wins what
Cheapest 1M-context option
Gemini 2.5 Flash
At $0.3/$2.5 per 1M tokens it undercuts Muse Spark 1.3 ($1.25/$4.25 per 1M tokens), and that gap compounds at volume.
Very fast
Gemini 2.5 Flash
Google's ultra-cheap, fast 1M-context model for high-volume multimodal work — and it runs cheaper at $0.3/$2.5 per 1M tokens.
High-volume multimodal
Gemini 2.5 Flash
Gemini 2.5 Flash lists high-volume multimodal among its strengths; Muse Spark 1.3 does not.
Agentic coding with ~20% fewer tool calls and ~25% fewer tokens than Muse Spark 1.2
Muse Spark 1.3
Meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review — and it is the newer of the two.
Muse Spark 1.3 lists near-perfect long-context retrieval (MRCR v2 512K-1M: 98.1) among its strengths; Gemini 2.5 Flash does not.
Lowest cost at scale
Gemini 2.5 Flash
At $0.3/$2.5 per 1M tokens, it is the cheaper of the two — the gap dominates the bill on high-volume workloads.
Which should you pick?
A cost-sensitive startup shipping high volume
→ Gemini 2.5 Flash
At $0.3/$2.5 per 1M tokens it undercuts Muse Spark 1.3, and on millions of tokens that margin decides the monthly bill.
Anyone whose priority is cheapest 1m-context option
→ Gemini 2.5 Flash
It is specifically built for that.
Anyone whose priority is agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2
→ Muse Spark 1.3
That is its strongest area.
Gemini 2.5 Flash: where it fits
Google's ultra-cheap, fast 1M-context model for high-volume multimodal work. Released June 2025 by Google, it is built for cheapest 1M-context option, very fast, high-volume multimodal, and workspace integration.
Its trade-offs are real: lighter reasoning than Pro tiers, and superseded by 3.5 Flash. At $0.3 in / $2.5 out per million tokens, it sits in the budget price band.
Muse Spark 1.3: where it fits
Meta's September 2, 2026 agentic-coding model update, cutting tool calls and token usage versus Muse Spark 1.2 while its highest-reasoning mode remains gated for safety review. Released September 2, 2026 by Meta, it is built for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than Muse Spark 1.2, deepSWE v1.1 long-horizon software engineering (75.4), near-perfect long-context retrieval (MRCR v2 512K-1M: 98.1), and ranks third overall on the Artificial Analysis Intelligence Index (score 61, xhigh variant; the limited-preview max variant scores 62) - behind only Claude Fable 5.1 and Claude Opus 5.
Its trade-offs: strongest 'max' reasoning configuration still gated pending additional safety testing, not yet open-weight, despite Meta roadmapping a future Muse Spark weights release, and no official SWE-bench Verified score published. At $1.25 in / $4.25 out per million tokens, it sits in the mid price band.
The bottom line for this matchup
Gemini 2.5 Flash and Muse Spark 1.3 overlap enough that the right pick depends on your specific job. Gemini 2.5 Flash costs less per token; and each leads in its own area — Gemini 2.5 Flash for cheapest 1m-context option, Muse Spark 1.3 for agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2. Rather than crowning one, run the same hard task through both once and let the results decide.
Want both Gemini 2.5 Flash and Muse Spark 1.3 without two subscriptions? LumiChats gives you these plus 40+ models under one ₹69/day pass (about $1/day) — draft with one, cross-check with the other.
Is Gemini 2.5 Flash or Muse Spark 1.3 better for coding?
Public SWE-Bench figures are not available for either model, so the honest test is your own repository — run an identical real bug through both. By design, Gemini 2.5 Flash leans toward cheapest 1m-context option while Muse Spark 1.3 leans toward agentic coding with ~20% fewer tool calls and ~25% fewer tokens than muse spark 1.2, and that positioning usually predicts which feels better on your codebase.
Which is cheaper, Gemini 2.5 Flash or Muse Spark 1.3?
Gemini 2.5 Flash is cheaper — $0.3/$2.5 per 1M tokens vs $1.25/$4.25 per 1M tokens, roughly 4.2× apart on input.
Which has the bigger context window?
Both advertise 1M (~1,500 pages). Remember advertised ≠ usable: recall typically degrades before the ceiling.
Can I use both Gemini 2.5 Flash and Muse Spark 1.3 together?
Yes — a multi-model platform like LumiChats gives you Gemini 2.5 Flash, Muse Spark 1.3 and 40+ others under one ₹69/day pass (about $1/day), so you can draft with one and cross-check with the other instead of buying two subscriptions.
Which is newer, Gemini 2.5 Flash or Muse Spark 1.3?
Muse Spark 1.3 — released September 2, 2026, about 15 months after Gemini 2.5 Flash.
Specifications and benchmarks reflect publicly reported figures as of June 2026 and may change as providers release updates. Always verify on your own workload.